Fix some CMEs and black screens seen during boot/splash. Should be minimal overhead after splash. (#1959)

Co-authored-by: Jason Mitchell <[email protected]>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,4 +1,4 @@
-# Description or your *PR* and other info
+# Description of your *PR* and other info
 <!-- Please include a summary of the change -->
 <!-- Any details that you think are important to review this PR? -->
 <!-- Are there any Issues / PRs related to this one? -->

.gitignore

@@ -12,6 +12,7 @@ build/
 /config/
 /crash-reports/
 /logs/
+tmp/
 options.txt
 /saves/
 usernamecache.json

dependencies.gradle

@@ -90,7 +90,7 @@ dependencies {
     compileOnly "org.apache.ant:ant:1.8.2"
 
     // Celeritas (transitive=false: deps provided by GTNHLib/runtime)
-    embedOnly("org.embeddedt.celeritas:celeritas-common:2.5.4-GTNH") { transitive = false }
+    embedOnly("org.embeddedt.celeritas:celeritas-common:2.5.5-GTNH") { transitive = false }
     embedOnly("org.embeddedt.celeritas:celeritas-lwjgl2-service:2.5.3-GTNH") { transitive = false }
 
     // Because who doesn't want NEI
@@ -144,7 +144,7 @@ dependencies {
     compileOnly(rfg.deobf("curse.maven:campfirebackport-387444:4611675"))
     compileOnly(rfg.deobf("curse.maven:xaeros-minimap-263420:5060684"))
     compileOnly(rfg.deobf("curse.maven:security-craft-64760:2818228"))
-    compileOnly(rfg.deobf("curse.maven:et-futurum-requiem-441392:5873837"))
+    compileOnly("ganymedes01.etfuturum:Et-Futurum-Requiem:2.6.49-GTNH:dev")
     compileOnly(rfg.deobf("curse.maven:biomes-o-plenty-220318:2499612"))
 
     devOnlyNonPublishable("com.github.GTNewHorizons:CosmeticArmorReworked:1.0.3-GTNH:dev")
@@ -180,4 +180,6 @@ dependencies {
     }
 
     compileOnly("mega:fluidlogged-mc1.7.10:0.1.2")
+
+    compileOnly("com.cardinalstar.cubicchunks:CubicChunks1710:v0.1.5-alpha:dev") { transitive = false }
 }

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/DisplayListManager.java

@@ -877,9 +877,14 @@ public class DisplayListManager {
             // Empty display list - per OpenGL spec, still valid after glNewList/glEndList
             compiled = CompiledDisplayList.EMPTY;
         }
-        final CompiledDisplayList previous = displayListCache.put(glListId, compiled);
-        if (previous != null && previous != CompiledDisplayList.EMPTY && previous != compiled) {
-            previous.delete();
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            final CompiledDisplayList previous = displayListCache.put(glListId, compiled);
+            if (previous != null && previous != CompiledDisplayList.EMPTY && previous != compiled) {
+                previous.delete();
+            }
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
         }
 
         // Log compilation details if enabled (before context restoration changes glListId)
@@ -1012,33 +1017,43 @@ public class DisplayListManager {
     }
 
     private static void executeDisplayList(int list) {
-        final CompiledDisplayList compiled = displayListCache.get(list);
-        if (compiled != null) {
-            compiled.render(list);
-            return;
-        }
-
-        // Fall back to VBOManager or legacy display list
-        if (list < 0) {
-            // Negative IDs are VBOManager space (entity models, etc.)
-            final VertexBuffer vbo = VBOManager.get(list);
-            if (vbo != null) {
-                vbo.render();
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            final CompiledDisplayList compiled = displayListCache.get(list);
+            if (compiled != null) {
+                compiled.render(list);
+                return;
             }
-            // Per OpenGL spec: if list is undefined, glCallList has no effect
+
+            // Fall back to VBOManager or legacy display list
+            if (list < 0) {
+                // Negative IDs are VBOManager space (entity models, etc.)
+                final VertexBuffer vbo = VBOManager.get(list);
+                if (vbo != null) {
+                    vbo.render();
+                }
+                // Per OpenGL spec: if list is undefined, glCallList has no effect
+            }
+            // An uncached positive-ID list = no-op (per OpenGL spec)
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
         }
-        // An uncached positive-ID list = no-op (per OpenGL spec)
     }
 
     /**
      * Delete display lists and free their VBO resources.
      */
     public static void glDeleteLists(int list, int range) {
-        for (int i = list; i < list + range; i++) {
-            CompiledDisplayList compiled = displayListCache.remove(i);
-            if (compiled != null) {
-                compiled.delete();
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            for (int i = list; i < list + range; i++) {
+                CompiledDisplayList compiled = displayListCache.remove(i);
+                if (compiled != null) {
+                    compiled.delete();
+                }
             }
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
         }
     }
 

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/GLStateManager.java

@@ -89,6 +89,7 @@ import java.nio.ByteBuffer;
 import java.nio.DoubleBuffer;
 import java.nio.FloatBuffer;
 import java.nio.IntBuffer;
+import java.nio.LongBuffer;
 import java.nio.ShortBuffer;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -96,6 +97,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.IntSupplier;
 
 import static com.gtnewhorizons.angelica.glsm.Vendor.AMD;
@@ -251,6 +253,18 @@ public class GLStateManager {
     // Reference to DrawableGL (main display context) - works with both FML and BLS splash
     @Setter private static Drawable drawableGL = null;
 
+    private static final ReentrantLock DRAW_LOCK = new ReentrantLock();
+
+    public static boolean acquireDrawLock() {
+        if (splashComplete) return false;
+        DRAW_LOCK.lock();
+        return true;
+    }
+
+    public static void releaseDrawLock() {
+        DRAW_LOCK.unlock();
+    }
+
     public static boolean isCachingEnabled() {
         if (splashComplete) return true;
         return Thread.currentThread() == drawableGLHolder;
@@ -2243,15 +2257,25 @@ public class GLStateManager {
     }
 
     public static void preDraw(int drawMode) {
-        prepareWideLineEmulation(drawMode);
-        ShaderManager.getInstance().preDraw();
-        prepareClientArrays();
+        final boolean locked = acquireDrawLock();
+        try {
+            prepareWideLineEmulation(drawMode);
+            ShaderManager.getInstance().preDraw();
+            prepareClientArrays();
+        } finally {
+            if (locked) releaseDrawLock();
+        }
     }
 
     public static void preDraw() {
-        disableWideLineEmulation();
-        ShaderManager.getInstance().preDraw();
-        prepareClientArrays();
+        final boolean locked = acquireDrawLock();
+        try {
+            disableWideLineEmulation();
+            ShaderManager.getInstance().preDraw();
+            prepareClientArrays();
+        } finally {
+            if (locked) releaseDrawLock();
+        }
     }
 
     public static void glDrawElements(int mode, ByteBuffer indices) {
@@ -3245,6 +3269,7 @@ public class GLStateManager {
         splashComplete = true;
         drawableGLHolder = null;
         drawableGL = null;
+        ImmediateModeRecorder.cleanupOrphanTessellators();
     }
 
     public static void glNewList(int list, int mode) {
@@ -5174,6 +5199,12 @@ public class GLStateManager {
         RENDER_BACKEND.deleteBuffers(buffers);
     }
 
+    public static void glDeleteBuffers(int[] buffers) {
+        for (int buffer : buffers) {
+            glDeleteBuffers(buffer);
+        }
+    }
+
     private static void invalidateDeletedBuffer(int buffer) {
         if (buffer == 0) return;
         if (boundVBO == buffer) boundVBO = 0;
@@ -5185,6 +5216,7 @@ public class GLStateManager {
         for (VAOManager.VAOData data : VAOManager.vaoMap.values()) {
             if (data.ebo == buffer) data.ebo = 0;
         }
+
     }
 
     public static void glBindBuffer(int target, int buffer) {
@@ -5237,34 +5269,279 @@ public class GLStateManager {
         return RENDER_BACKEND.genBuffers();
     }
 
+    public static void glGenBuffers(IntBuffer buffers) {
+        for (int i = buffers.position(); i < buffers.limit(); i++) buffers.put(i, RENDER_BACKEND.genBuffers());
+    }
+
+    public static void glGenBuffers(int[] buffers) {
+        for (int i = 0; i < buffers.length; i++) buffers[i] = RENDER_BACKEND.genBuffers();
+    }
+
+    public static int glCreateBuffers() {
+        return RENDER_BACKEND.createBuffers();
+    }
+
+    public static void glCreateBuffers(IntBuffer buffers) {
+        for (int i = buffers.position(); i < buffers.limit(); i++) buffers.put(i, RENDER_BACKEND.createBuffers());
+    }
+
+    public static void glCreateBuffers(int[] buffers) {
+        for (int i = 0; i < buffers.length; i++) buffers[i] = RENDER_BACKEND.createBuffers();
+    }
+
     public static void glBufferData(int target, long size, int usage) { RENDER_BACKEND.bufferData(target, size, usage); }
+    public static void glBufferData(int target, ByteBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
+    public static void glBufferData(int target, ShortBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
+    public static void glBufferData(int target, IntBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
+    public static void glBufferData(int target, FloatBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
+    public static void glBufferData(int target, DoubleBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
+    public static void glBufferData(int target, LongBuffer data, int usage) { glBufferData(target, MemoryUtilities.memByteBuffer(data), usage); }
     public static void glBufferData(int target, int[] data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
     public static void glBufferData(int target, float[] data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
-    public static void glBufferData(int target, java.nio.ByteBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
-    public static void glBufferData(int target, java.nio.ShortBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
-    public static void glBufferData(int target, java.nio.IntBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
-    public static void glBufferData(int target, java.nio.FloatBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
-    public static void glBufferData(int target, java.nio.DoubleBuffer data, int usage) { RENDER_BACKEND.bufferData(target, data, usage); }
-    public static void glBufferSubData(int target, long offset, java.nio.ByteBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
-    public static void glBufferSubData(int target, long offset, java.nio.ShortBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
-    public static void glBufferSubData(int target, long offset, java.nio.IntBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
-    public static void glBufferSubData(int target, long offset, java.nio.FloatBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
-    public static void glBufferSubData(int target, long offset, java.nio.DoubleBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
+    public static void glBufferData(int target, short[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferData(target, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferData(int target, long[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferData(target, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferData(int target, double[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferData(target, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+
+    public static void nglBufferData(int target, long size, long data, int usage) {
+        if (data == 0L) {
+            glBufferData(target, size, usage);
+            return;
+        }
+        glBufferData(target, MemoryUtilities.memByteBuffer(data, checkedSize(size)), usage);
+    }
+
+    public static void glBufferSubData(int target, long offset, ByteBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
+    public static void glBufferSubData(int target, long offset, ShortBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
+    public static void glBufferSubData(int target, long offset, IntBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
+    public static void glBufferSubData(int target, long offset, FloatBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
+    public static void glBufferSubData(int target, long offset, DoubleBuffer data) { RENDER_BACKEND.bufferSubData(target, offset, data); }
+    public static void glBufferSubData(int target, long offset, LongBuffer data) { glBufferSubData(target, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glBufferSubData(int target, long offset, short[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferSubData(target, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferSubData(int target, long offset, int[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferSubData(target, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferSubData(int target, long offset, long[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferSubData(target, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferSubData(int target, long offset, float[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferSubData(target, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferSubData(int target, long offset, double[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferSubData(target, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+
+    public static void nglBufferSubData(int target, long offset, long size, long data) { glBufferSubData(target, offset, MemoryUtilities.memByteBuffer(data, checkedSize(size))); }
+
     public static ByteBuffer glMapBuffer(int target, int access) { return RENDER_BACKEND.mapBuffer(target, access); }
+    public static ByteBuffer glMapBuffer(int target, int access, ByteBuffer old_buffer) { return glMapBuffer(target, access); }
     public static ByteBuffer glMapBuffer(int target, int access, long length, ByteBuffer old_buffer) { return RENDER_BACKEND.mapBuffer(target, access, length, old_buffer); }
+    public static ByteBuffer glMapBufferRange(int target, long offset, long length, int access) { return RENDER_BACKEND.mapBufferRange(target, offset, length, access); }
+    public static ByteBuffer glMapBufferRange(int target, long offset, long length, int access, ByteBuffer old_buffer) { return glMapBufferRange(target, offset, length, access); }
+    public static void glFlushMappedBufferRange(int target, long offset, long length) { RENDER_BACKEND.flushMappedBufferRange(target, offset, length); }
     public static boolean glUnmapBuffer(int target) { return RENDER_BACKEND.unmapBuffer(target); }
-    public static void glGetBufferSubData(int target, long offset, java.nio.ByteBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
-    public static void glGetBufferSubData(int target, long offset, java.nio.ShortBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
-    public static void glGetBufferSubData(int target, long offset, java.nio.IntBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
-    public static void glGetBufferSubData(int target, long offset, java.nio.FloatBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
-    public static void glGetBufferSubData(int target, long offset, java.nio.DoubleBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
+
+    public static void glGetBufferSubData(int target, long offset, ByteBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
+    public static void glGetBufferSubData(int target, long offset, ShortBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
+    public static void glGetBufferSubData(int target, long offset, IntBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
+    public static void glGetBufferSubData(int target, long offset, FloatBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
+    public static void glGetBufferSubData(int target, long offset, DoubleBuffer data) { RENDER_BACKEND.getBufferSubData(target, offset, data); }
+    public static void glGetBufferSubData(int target, long offset, LongBuffer data) { glGetBufferSubData(target, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glGetBufferSubData(int target, long offset, short[] data) {
+        final ByteBuffer copy = MemoryUtilities.memAlloc(data.length << 1);
+        glGetBufferSubData(target, offset, copy);
+        copy.asShortBuffer().get(data);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glGetBufferSubData(int target, long offset, int[] data) {
+        final ByteBuffer copy = MemoryUtilities.memAlloc(data.length << 2);
+        glGetBufferSubData(target, offset, copy);
+        copy.asIntBuffer().get(data);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glGetBufferSubData(int target, long offset, long[] data) {
+        final ByteBuffer copy = MemoryUtilities.memAlloc(data.length << 3);
+        glGetBufferSubData(target, offset, copy);
+        copy.asLongBuffer().get(data);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glGetBufferSubData(int target, long offset, float[] data) {
+        final ByteBuffer copy = MemoryUtilities.memAlloc(data.length << 2);
+        glGetBufferSubData(target, offset, copy);
+        copy.asFloatBuffer().get(data);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glGetBufferSubData(int target, long offset, double[] data) {
+        final ByteBuffer copy = MemoryUtilities.memAlloc(data.length << 3);
+        glGetBufferSubData(target, offset, copy);
+        copy.asDoubleBuffer().get(data);
+        MemoryUtilities.memFree(copy);
+    }
+
+    public static void nglGetBufferSubData(int target, long offset, long size, long data) { glGetBufferSubData(target, offset, MemoryUtilities.memByteBuffer(data, checkedSize(size))); }
+
     public static int glGetBufferParameteri(int target, int pname) { return RENDER_BACKEND.getBufferParameteri(target, pname); }
-    public static void glBufferStorage(int target, java.nio.ByteBuffer data, int flags) { RENDER_BACKEND.bufferStorage(target, data, flags); }
+    public static int glGetBufferParameter(int target, int pname) { return glGetBufferParameteri(target, pname); }
+    public static void glGetBufferParameter(int target, int pname, IntBuffer params) { params.put(params.position(), glGetBufferParameteri(target, pname)); }
+    public static void glGetBufferParameteriv(int target, int pname, IntBuffer params) { params.put(params.position(), glGetBufferParameteri(target, pname)); }
+    public static void glGetBufferParameteriv(int target, int pname, int[] params) { params[0] = glGetBufferParameteri(target, pname); }
+
     public static void glBufferStorage(int target, long size, int flags) { RENDER_BACKEND.bufferStorage(target, size, flags); }
-    public static void glClearBufferSubData(int target, int internalFormat, long offset, long size, int format, int type, java.nio.ByteBuffer data) { RENDER_BACKEND.clearBufferSubData(target, internalFormat, offset, size, format, type, data); }
+    public static void glBufferStorage(int target, ByteBuffer data, int flags) { RENDER_BACKEND.bufferStorage(target, data, flags); }
+    public static void glBufferStorage(int target, ShortBuffer data, int flags) { glBufferStorage(target, MemoryUtilities.memByteBuffer(data), flags); }
+    public static void glBufferStorage(int target, IntBuffer data, int flags) { glBufferStorage(target, MemoryUtilities.memByteBuffer(data), flags); }
+    public static void glBufferStorage(int target, FloatBuffer data, int flags) { glBufferStorage(target, MemoryUtilities.memByteBuffer(data), flags); }
+    public static void glBufferStorage(int target, DoubleBuffer data, int flags) { glBufferStorage(target, MemoryUtilities.memByteBuffer(data), flags); }
+    public static void glBufferStorage(int target, short[] data, int flags) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferStorage(target, copy, flags);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferStorage(int target, int[] data, int flags) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferStorage(target, copy, flags);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferStorage(int target, float[] data, int flags) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferStorage(target, copy, flags);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glBufferStorage(int target, double[] data, int flags) {
+        final ByteBuffer copy = copyOf(data);
+        glBufferStorage(target, copy, flags);
+        MemoryUtilities.memFree(copy);
+    }
+
+    public static void glNamedBufferData(int buffer, long size, int usage) { RENDER_BACKEND.namedBufferData(buffer, size, usage); }
+    public static void glNamedBufferData(int buffer, ByteBuffer data, int usage) { RENDER_BACKEND.namedBufferData(buffer, data, usage); }
+    public static void glNamedBufferData(int buffer, FloatBuffer data, int usage) { RENDER_BACKEND.namedBufferData(buffer, data, usage); }
+    public static void glNamedBufferData(int buffer, ShortBuffer data, int usage) { glNamedBufferData(buffer, MemoryUtilities.memByteBuffer(data), usage); }
+    public static void glNamedBufferData(int buffer, IntBuffer data, int usage) { glNamedBufferData(buffer, MemoryUtilities.memByteBuffer(data), usage); }
+    public static void glNamedBufferData(int buffer, LongBuffer data, int usage) { glNamedBufferData(buffer, MemoryUtilities.memByteBuffer(data), usage); }
+    public static void glNamedBufferData(int buffer, DoubleBuffer data, int usage) { glNamedBufferData(buffer, MemoryUtilities.memByteBuffer(data), usage); }
+    public static void glNamedBufferData(int buffer, short[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferData(buffer, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferData(int buffer, int[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferData(buffer, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferData(int buffer, long[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferData(buffer, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferData(int buffer, float[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferData(buffer, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferData(int buffer, double[] data, int usage) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferData(buffer, copy, usage);
+        MemoryUtilities.memFree(copy);
+    }
+
+    public static void glNamedBufferSubData(int buffer, long offset, ByteBuffer data) { RENDER_BACKEND.namedBufferSubData(buffer, offset, data); }
+    public static void glNamedBufferSubData(int buffer, long offset, ShortBuffer data) { glNamedBufferSubData(buffer, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glNamedBufferSubData(int buffer, long offset, IntBuffer data) { glNamedBufferSubData(buffer, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glNamedBufferSubData(int buffer, long offset, LongBuffer data) { glNamedBufferSubData(buffer, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glNamedBufferSubData(int buffer, long offset, FloatBuffer data) { glNamedBufferSubData(buffer, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glNamedBufferSubData(int buffer, long offset, DoubleBuffer data) { glNamedBufferSubData(buffer, offset, MemoryUtilities.memByteBuffer(data)); }
+    public static void glNamedBufferSubData(int buffer, long offset, short[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferSubData(buffer, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferSubData(int buffer, long offset, int[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferSubData(buffer, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferSubData(int buffer, long offset, long[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferSubData(buffer, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferSubData(int buffer, long offset, float[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferSubData(buffer, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+    public static void glNamedBufferSubData(int buffer, long offset, double[] data) {
+        final ByteBuffer copy = copyOf(data);
+        glNamedBufferSubData(buffer, offset, copy);
+        MemoryUtilities.memFree(copy);
+    }
+
+    public static void glClearBufferSubData(int target, int internalFormat, long offset, long size, int format, int type, ByteBuffer data) { RENDER_BACKEND.clearBufferSubData(target, internalFormat, offset, size, format, type, data); }
     public static boolean glIsBuffer(int buffer) { return RENDER_BACKEND.isBuffer(buffer); }
     public static void glCopyBufferSubData(int readTarget, int writeTarget, long readOffset, long writeOffset, long size) { RENDER_BACKEND.copyBufferSubData(readTarget, writeTarget, readOffset, writeOffset, size); }
 
+    private static int checkedSize(long size) {
+        if (size < 0 || size > Integer.MAX_VALUE) {
+            throw new IllegalArgumentException("Buffer range does not fit a ByteBuffer wrapper: " + size);
+        }
+        return (int) size;
+    }
+
+    private static ByteBuffer copyOf(short[] data) {
+        final ByteBuffer bb = MemoryUtilities.memAlloc(data.length << 1);
+        bb.asShortBuffer().put(data);
+        return bb;
+    }
+
+    private static ByteBuffer copyOf(int[] data) {
+        final ByteBuffer bb = MemoryUtilities.memAlloc(data.length << 2);
+        bb.asIntBuffer().put(data);
+        return bb;
+    }
+
+    private static ByteBuffer copyOf(long[] data) {
+        final ByteBuffer bb = MemoryUtilities.memAlloc(data.length << 3);
+        bb.asLongBuffer().put(data);
+        return bb;
+    }
+
+    private static ByteBuffer copyOf(float[] data) {
+        final ByteBuffer bb = MemoryUtilities.memAlloc(data.length << 2);
+        bb.asFloatBuffer().put(data);
+        return bb;
+    }
+
+    private static ByteBuffer copyOf(double[] data) {
+        final ByteBuffer bb = MemoryUtilities.memAlloc(data.length << 3);
+        bb.asDoubleBuffer().put(data);
+        return bb;
+    }
+
     public static void glBindVertexArray(int array) {
         if (DisplayListManager.isRecording()) {
             DisplayListManager.recordBindVAO(array);
@@ -6165,7 +6442,7 @@ public class GLStateManager {
         RENDER_BACKEND.getUniformiv(program, location, params);
     }
     public static void glGetTexImage(int target, int level, int format, int type, long pixels) {
-        GL11.glGetTexImage(target, level, format, type, pixels);
+        RENDER_BACKEND.getTexImage(target, level, format, type, pixels);
     }
 
     /**

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/QuadConverter.java

@@ -91,21 +91,26 @@ public final class QuadConverter {
     }
 
     private static void drawSharedQuadEbo(int first, int vertexCount, int primcount, boolean instanced) {
-        GLStateManager.preDraw();
-        assert first % 4 == 0 : "QuadConverter: first (" + first + ") must be a multiple of 4";
-        assert vertexCount % 4 == 0 : "QuadConverter: vertexCount (" + vertexCount + ") must be a multiple of 4";
-        final int quadCount = vertexCount / 4;
-        final int prevEbo = GLStateManager.getBoundEBO();
-        ensureCapacity(first / 4 + quadCount);
-        RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, eboId);
-        // Index offset: first vertex / 4 quads * 6 indices * 4 bytes per int
-        final long indexOffset = (long) (first / 4) * 6 * 4;
-        if (instanced) {
-            RENDER_BACKEND.drawElementsInstanced(GL11.GL_TRIANGLES, quadCount * 6, INDEX_TYPE, indexOffset, primcount);
-        } else {
-            RENDER_BACKEND.drawElements(GL11.GL_TRIANGLES, quadCount * 6, INDEX_TYPE, indexOffset);
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            GLStateManager.preDraw();
+            assert first % 4 == 0 : "QuadConverter: first (" + first + ") must be a multiple of 4";
+            assert vertexCount % 4 == 0 : "QuadConverter: vertexCount (" + vertexCount + ") must be a multiple of 4";
+            final int quadCount = vertexCount / 4;
+            final int prevEbo = GLStateManager.getBoundEBO();
+            ensureCapacity(first / 4 + quadCount);
+            RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, eboId);
+            // Index offset: first vertex / 4 quads * 6 indices * 4 bytes per int
+            final long indexOffset = (long) (first / 4) * 6 * 4;
+            if (instanced) {
+                RENDER_BACKEND.drawElementsInstanced(GL11.GL_TRIANGLES, quadCount * 6, INDEX_TYPE, indexOffset, primcount);
+            } else {
+                RENDER_BACKEND.drawElements(GL11.GL_TRIANGLES, quadCount * 6, INDEX_TYPE, indexOffset);
+            }
+            RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, prevEbo);
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
         }
-        RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, prevEbo);
     }
 
     /**
@@ -123,32 +128,37 @@ public final class QuadConverter {
     }
 
     private static void uploadAndDraw(ByteBuffer dst, int triIndexCount, int indexType, int bytesPerIndex, int primcount, boolean instanced) {
-        GLStateManager.preDraw();
-        final int needed = triIndexCount * bytesPerIndex;
-        final int prevEbo = GLStateManager.getBoundEBO();
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            GLStateManager.preDraw();
+            final int needed = triIndexCount * bytesPerIndex;
+            final int prevEbo = GLStateManager.getBoundEBO();
 
-        if (scratchEboId == 0) {
-            scratchEboId = RENDER_BACKEND.genBuffers();
+            if (scratchEboId == 0) {
+                scratchEboId = RENDER_BACKEND.genBuffers();
+            }
+
+            RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, scratchEboId);
+
+            if (needed > scratchEboCapacity) {
+                // Power-of-2 growth -- allocate full capacity, upload actual data
+                int newCap = Math.max(4096, scratchEboCapacity);
+                while (newCap < needed) newCap *= 2;
+                RENDER_BACKEND.bufferData(GL15.GL_ELEMENT_ARRAY_BUFFER, newCap, GL15.GL_STREAM_DRAW);
+                scratchEboCapacity = newCap;
+            }
+            RENDER_BACKEND.bufferSubData(GL15.GL_ELEMENT_ARRAY_BUFFER, 0, dst);
+
+            if (instanced) {
+                RENDER_BACKEND.drawElementsInstanced(GL11.GL_TRIANGLES, triIndexCount, indexType, 0L, primcount);
+            } else {
+                RENDER_BACKEND.drawElements(GL11.GL_TRIANGLES, triIndexCount, indexType, 0L);
+            }
+
+            RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, prevEbo);
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
         }
-
-        RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, scratchEboId);
-
-        if (needed > scratchEboCapacity) {
-            // Power-of-2 growth — allocate full capacity, upload actual data
-            int newCap = Math.max(4096, scratchEboCapacity);
-            while (newCap < needed) newCap *= 2;
-            RENDER_BACKEND.bufferData(GL15.GL_ELEMENT_ARRAY_BUFFER, newCap, GL15.GL_STREAM_DRAW);
-            scratchEboCapacity = newCap;
-        }
-        RENDER_BACKEND.bufferSubData(GL15.GL_ELEMENT_ARRAY_BUFFER, 0, dst);
-
-        if (instanced) {
-            RENDER_BACKEND.drawElementsInstanced(GL11.GL_TRIANGLES, triIndexCount, indexType, 0L, primcount);
-        } else {
-            RENDER_BACKEND.drawElements(GL11.GL_TRIANGLES, triIndexCount, indexType, 0L);
-        }
-
-        RENDER_BACKEND.bindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, prevEbo);
         memFree(dst);
     }
 

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/RenderSystem.java

@@ -146,6 +146,9 @@ public class RenderSystem {
                 coreProfile = true;
                 GLStateManager.LOGGER.info("GL 3.3 core profile detected, enabling FFP shader emulation.");
                 ShaderManager.getInstance().enable();
+            } else {
+                throw new IllegalStateException("Non-core GL context (profile mask 0x" + Integer.toHexString(profileMask)
+                    + "); FFP emulation requires a core profile and nothing would render. Context creation should have rejected this.");
             }
         }
 
@@ -301,7 +304,7 @@ public class RenderSystem {
     }
 
     public static void bufferData(int target, FloatBuffer data, int usage) {
-        RENDER_BACKEND.bufferData(target, data, usage);
+        GLStateManager.glBufferData(target, data, usage);
     }
 
     public static int bufferStorage(int target, FloatBuffer data, int usage) {
@@ -447,7 +450,7 @@ public class RenderSystem {
     }
 
     public static int createBuffers() {
-        return RENDER_BACKEND.genBuffers();
+        return GLStateManager.glGenBuffers();
     }
 
     public static void bindBufferBase(int target, int index, int buffer) {
@@ -455,13 +458,13 @@ public class RenderSystem {
     }
 
     public static void bufferStorage(int target, long size, int flags) {
-        RENDER_BACKEND.bufferStorage(target, size, flags);
+        GLStateManager.glBufferStorage(target, size, flags);
     }
 
     public static void clearBufferSubData(int target, int internalFormat, long offset, long size, int format, int type, int[] data) {
         final ByteBuffer buf = BufferUtils.createByteBuffer(data.length * 4);
         buf.asIntBuffer().put(data);
-        RENDER_BACKEND.clearBufferSubData(target, internalFormat, offset, size, format, type, buf);
+        GLStateManager.glClearBufferSubData(target, internalFormat, offset, size, format, type, buf);
     }
 
     public static void deleteBuffers(int buffer) {
@@ -549,7 +552,7 @@ public class RenderSystem {
         }
     }
 
-    /** Parse a GL version string (e.g. "4.6.0 NVIDIA ...") into concatenated digits "460". Inlined from StandardMacros.getGlVersion(). */
+    /** Parse a GL version string (e.g. "4.6.0 NVIDIA ...") into concatenated digits "460" */
     static String parseGlVersionString(String info) {
         final Matcher matcher = SEMVER_PATTERN.matcher(Objects.requireNonNull(info));
         if (!matcher.matches()) {
@@ -561,4 +564,18 @@ public class RenderSystem {
         if (bugfix == null || bugfix.isEmpty()) bugfix = "0";
         return major + minor + bugfix;
     }
+
+    /** Parse a GL version string into packed major*10+minor (e.g. "4.3.0 - Build ..." -> 43), or -1 if unparseable. */
+    public static int parseMajorMinor(String glVersion) {
+        if (glVersion == null) return -1;
+        final Matcher matcher = SEMVER_PATTERN.matcher(glVersion.trim());
+        if (!matcher.matches()) return -1;
+        return Integer.parseInt(matcher.group("major")) * 10 + Integer.parseInt(matcher.group("minor"));
+    }
+
+    public static boolean isContextValid(int requestedMajor, int requestedMinor, int actualVersion, boolean coreBitSet) {
+        if (!coreBitSet) return false;
+        if (actualVersion < 0) return true;
+        return actualVersion >= requestedMajor * 10 + requestedMinor;
+    }
 }

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/backend/Lwjgl2GLRenderBackend.java

@@ -327,7 +327,7 @@ public final class Lwjgl2GLRenderBackend extends RenderBackend {
 
     @Override
     public void copyBufferSubData(int readTarget, int writeTarget, long readOffset, long writeOffset, long size) {
-        throw new UnsupportedOperationException("GLRenderBackend.copyBufferSubData should not be called — LWJGL service handles this");
+        GL31.glCopyBufferSubData(readTarget, writeTarget, readOffset, writeOffset, size);
     }
 
     @Override
@@ -622,6 +622,11 @@ public final class Lwjgl2GLRenderBackend extends RenderBackend {
         GL11.glGetTexImage(target, level, format, type, pixels);
     }
 
+    @Override
+    public void getTexImage(int target, int level, int format, int type, long pixelBufferOffset) {
+        GL11.glGetTexImage(target, level, format, type, pixelBufferOffset);
+    }
+
     @Override
     public int getFramebufferAttachmentParameteri(int target, int attachment, int pname) {
         return GL30.glGetFramebufferAttachmentParameteri(target, attachment, pname);
@@ -1058,6 +1063,11 @@ public final class Lwjgl2GLRenderBackend extends RenderBackend {
         return GL30.glMapBufferRange(target, offset, length, access, null);
     }
 
+    @Override
+    public void flushMappedBufferRange(int target, long offset, long length) {
+        GL30.glFlushMappedBufferRange(target, offset, length);
+    }
+
     @Override
     public int genVertexArrays() {
         return GL30.glGenVertexArrays();
@@ -1249,6 +1259,11 @@ public final class Lwjgl2GLRenderBackend extends RenderBackend {
         return GL45.glCreateBuffers();
     }
 
+    @Override
+    public void namedBufferData(int buffer, long size, int usage) {
+        GL45.glNamedBufferData(buffer, size, usage);
+    }
+
     @Override
     public void namedBufferData(int buffer, ByteBuffer data, int usage) {
         GL45.glNamedBufferData(buffer, data, usage);

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/backend/RenderBackend.java

@@ -151,6 +151,7 @@ public abstract class RenderBackend {
     public abstract void readPixels(int x, int y, int width, int height, int format, int type, IntBuffer pixels);
     public abstract void getTexImage(int target, int level, int format, int type, ByteBuffer pixels);
     public abstract void getTexImage(int target, int level, int format, int type, IntBuffer pixels);
+    public abstract void getTexImage(int target, int level, int format, int type, long pixelBufferOffset);
     public abstract int getFramebufferAttachmentParameteri(int target, int attachment, int pname);
 
     public abstract int createShader(int type);
@@ -249,6 +250,7 @@ public abstract class RenderBackend {
     public abstract int getBufferParameteri(int target, int pname);
     public abstract boolean isBuffer(int buffer);
     public abstract ByteBuffer mapBufferRange(int target, long offset, long length, int access);
+    public abstract void flushMappedBufferRange(int target, long offset, long length);
 
     public abstract int genVertexArrays();
     public abstract void deleteVertexArrays(int array);
@@ -292,6 +294,7 @@ public abstract class RenderBackend {
     public abstract void namedFramebufferDrawBuffers(int framebuffer, IntBuffer bufs);
     public abstract void blitNamedFramebuffer(int readFramebuffer, int drawFramebuffer, int srcX0, int srcY0, int srcX1, int srcY1, int dstX0, int dstY0, int dstX1, int dstY1, int mask, int filter);
     public abstract int createBuffers();
+    public abstract void namedBufferData(int buffer, long size, int usage);
     public abstract void namedBufferData(int buffer, ByteBuffer data, int usage);
     public abstract void namedBufferData(int buffer, FloatBuffer data, int usage);
     public abstract void namedBufferSubData(int buffer, long offset, ByteBuffer data);

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/dsa/DSAARB.java

@@ -104,8 +104,8 @@ public class DSAARB extends DSAUnsupported {
 
     @Override
     public int bufferStorage(int target, FloatBuffer data, int usage) {
-        final int buffer = RENDER_BACKEND.createBuffers();
-        RENDER_BACKEND.namedBufferData(buffer, data, usage);
+        final int buffer = GLStateManager.glCreateBuffers();
+        GLStateManager.glNamedBufferData(buffer, data, usage);
         return buffer;
     }
 

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/dsa/DSAUnsupported.java

@@ -121,9 +121,9 @@ public class DSAUnsupported implements DSAAccess {
 
     @Override
     public int bufferStorage(int target, FloatBuffer data, int usage) {
-        final int buffer = RENDER_BACKEND.genBuffers();
+        final int buffer = GLStateManager.glGenBuffers();
         GLStateManager.glBindBuffer(target, buffer);
-        RENDER_BACKEND.bufferData(target, data, usage);
+        GLStateManager.glBufferData(target, data, usage);
         GLStateManager.glBindBuffer(target, 0);
 
         return buffer;

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/ffp/ShaderManager.java

@@ -6,8 +6,10 @@ import com.gtnewhorizons.angelica.glsm.GLStateManager;
 import com.gtnewhorizons.angelica.glsm.hooks.DeferredBlendHandler;
 import com.gtnewhorizons.angelica.glsm.hooks.GLSMHooks;
 import com.gtnewhorizons.angelica.glsm.hooks.GLSMInitConfig;
+import com.gtnewhorizons.angelica.glsm.QuadConverter;
 import com.gtnewhorizons.angelica.glsm.stacks.Vec3fStack;
 import com.gtnewhorizons.angelica.glsm.stacks.Vec4fStack;
+import com.gtnewhorizons.angelica.glsm.streaming.TessellatorStreamingDrawer;
 import lombok.Getter;
 import org.joml.Vector3f;
 import org.joml.Vector4f;
@@ -66,11 +68,33 @@ public final class ShaderManager {
     }
 
     public void enable() {
+        warmUp();
         enabled = true;
 
         GLStateManager.LOGGER.info("FFP shader emulation enabled");
     }
 
+    // Force loading of classes before the SplashThread kicks off
+    // Ensure it's GL free
+    private static void warmUp() {
+        try {
+            final long[] fkScratch = new long[FragmentKey.MAX_UNITS];
+            final int fkLen = FragmentKey.packFromState(fkScratch);
+            final int fragMask = FragmentKey.unitMaskFromPacked(fkScratch, fkLen);
+            final long vkPacked = VertexKey.packFromState(true, true, true, true, fragMask);
+            final VertexKey vk = VertexKey.fromPacked(vkPacked);
+            VertexShaderGenerator.generate(vk);
+            FragmentShaderGenerator.generate(FragmentKey.fromPacked(fkScratch, fkLen));
+            GeometryShaderGenerator.generate(vk);
+            final Class<?>[] touched = { Program.class, ShaderCache.class, TessellatorStreamingDrawer.class, QuadConverter.class };
+            for (Class<?> c : touched) {
+                c.getName();
+            }
+        } catch (Throwable t) {
+            GLStateManager.LOGGER.warn("FFP warmup failed; draw-path classes will resolve lazily", t);
+        }
+    }
+
     public void disable() {
         enabled = false;
     }

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/ffp/VAOManager.java

@@ -40,6 +40,7 @@ public final class VAOManager {
             current.vertexFlags = currentVertexFlags;
             current.ebo = boundEBO;
             current.attribs = currentAttribs;
+            current.clientSideEnabledCount = clientSideEnabledCount;
         }
 
         VAOData data = vaoMap.get(vaoId);
@@ -51,8 +52,7 @@ public final class VAOManager {
         currentVertexFlags = data.vertexFlags;
         currentAttribs = data.attribs;
         boundEBO = data.ebo;
-
-        recomputeClientSideCount();
+        clientSideEnabledCount = data.clientSideEnabledCount;
     }
 
     public static void onDeleteVertexArray(int vaoId) {
@@ -68,6 +68,7 @@ public final class VAOManager {
         public Attrib[] attribs;
         public int vertexFlags;
         public int ebo;
+        public int clientSideEnabledCount;
 
         public VAOData() {
             attribs = new Attrib[MAX_ATTRIBS];
@@ -183,14 +184,6 @@ public final class VAOManager {
 
 
 
-    private static void recomputeClientSideCount() {
-        int count = 0;
-        for (int i = 0; i < MAX_ATTRIBS; i++) {
-            if (isClientSideAttrib(i)) count++;
-        }
-        clientSideEnabledCount = count;
-    }
-
     /**
      * Returns true if any currently enabled vertex attribute was registered without a VBO
      * (i.e. as a client-side pointer). In core profile, such attribs are treated as null

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/recording/ImmediateModeRecorder.java

@@ -10,6 +10,8 @@ import org.lwjgl.opengl.GL11;
 
 import java.nio.ByteBuffer;
 import java.util.Arrays;
+import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedQueue;
 
 /**
  * Records immediate mode GL calls (glBegin/glEnd/glVertex) via {@link DirectTessellator}.
@@ -18,28 +20,37 @@ import java.util.Arrays;
 public final class ImmediateModeRecorder {
     private static final CallbackTessellator tessellator = new CallbackTessellator(TessellatorManager.DEFAULT_BUFFER_SIZE);
 
-    /** Separate tessellator for the splash thread. Nulled after splash completes. */
-    private static DirectTessellator splashTessellator;
+    private record ThreadTessellator(Thread thread, DirectTessellator tessellator) {}
+
+    private static final Queue<ThreadTessellator> threadTessellators = new ConcurrentLinkedQueue<>();
+    private static final ThreadLocal<DirectTessellator> threadTessellator = ThreadLocal.withInitial(() -> {
+        final DirectTessellator t = new DirectTessellator(TessellatorManager.DEFAULT_BUFFER_SIZE);
+        threadTessellators.add(new ThreadTessellator(Thread.currentThread(), t));
+        cleanupOrphanTessellators();
+        return t;
+    });
 
     private ImmediateModeRecorder() {
 
     }
 
-    public static void initSplashTessellator() {
-        splashTessellator = new DirectTessellator(TessellatorManager.DEFAULT_BUFFER_SIZE);
+    public static int getThreadTessellatorCount() {
+        return threadTessellators.size();
     }
 
-    public static void destroySplashTessellator() {
-        splashTessellator.delete();
-        splashTessellator = null;
+    public static synchronized void cleanupOrphanTessellators() {
+        threadTessellators.removeIf(tt -> {
+            if (tt.thread().isAlive()) return false;
+            tt.tessellator().delete();
+            return true;
+        });
     }
 
     private static DirectTessellator tessellator() {
-        final DirectTessellator splash = splashTessellator;
-        if (splash != null && Thread.currentThread() != GLStateManager.getMainThread()) {
-            return splash;
+        if (Thread.currentThread() == GLStateManager.getMainThread()) {
+            return tessellator;
         }
-        return tessellator;
+        return threadTessellator.get();
     }
 
     public static DirectTessellator getInternalTessellator() {

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/redirect/GLSMRedirector.java

@@ -48,6 +48,11 @@ public class GLSMRedirector {
     private static final String ARBInstancedArrays = "org/lwjgl/opengl/ARBInstancedArrays";
     private static final String ARBDrawInstanced = "org/lwjgl/opengl/ARBDrawInstanced";
     private static final String EXTDrawInstanced = "org/lwjgl/opengl/EXTDrawInstanced";
+    private static final String ARBBufferObject = "org/lwjgl/opengl/ARBBufferObject";
+    private static final String ARBVertexBufferObject = "org/lwjgl/opengl/ARBVertexBufferObject";
+    private static final String ARBBufferStorage = "org/lwjgl/opengl/ARBBufferStorage";
+    private static final String ARBCopyBuffer = "org/lwjgl/opengl/ARBCopyBuffer";
+    private static final String ARBMapBufferRange = "org/lwjgl/opengl/ARBMapBufferRange";
 
     // Redirect VAO related calls from NHLib
     private static final String UniversalVAO = "com/gtnewhorizon/gtnhlib/client/opengl/UniversalVAO";
@@ -285,11 +290,16 @@ public class GLSMRedirector {
             .add("glBindBuffer")
             .add("glDeleteBuffers")
             .add("glBufferData")
+            .add("nglBufferData")
             .add("glBufferSubData")
+            .add("nglBufferSubData")
             .add("glMapBuffer")
             .add("glUnmapBuffer")
             .add("glGetBufferSubData")
+            .add("nglGetBufferSubData")
             .add("glGetBufferParameteri")
+            .add("glGetBufferParameter")
+            .add("glGetBufferParameteriv")
             .add("glIsBuffer");
         final var gl20 = RedirectMap.newMap()
             .add("glBlendEquationSeparate")
@@ -356,10 +366,13 @@ public class GLSMRedirector {
             .add("glVertexAttribIPointer")
             .add("glGenerateMipmap")
             .add("glGetFramebufferAttachmentParameteri")
-            .add("glBlitFramebuffer");
+            .add("glBlitFramebuffer")
+            .add("glMapBufferRange")
+            .add("glFlushMappedBufferRange");
         final var gl31 = RedirectMap.newMap()
             .add("glDrawElementsInstanced")
-            .add("glDrawArraysInstanced");
+            .add("glDrawArraysInstanced")
+            .add("glCopyBufferSubData");
         final var gl32 = RedirectMap.newMap()
             .add("glFramebufferTexture");
         final var gl33 = RedirectMap.newMap()
@@ -383,6 +396,10 @@ public class GLSMRedirector {
         final var gl44 = RedirectMap.newMap()
             .add("glBufferStorage")
             .add("glClearTexImage");
+        final var gl45 = RedirectMap.newMap()
+            .add("glCreateBuffers")
+            .add("glNamedBufferData")
+            .add("glNamedBufferSubData");
 
         // Merge all GL version maps into the flat lookup
         glMethodRedirects.putAll(gl11);
@@ -398,6 +415,7 @@ public class GLSMRedirector {
         glMethodRedirects.putAll(gl42);
         glMethodRedirects.putAll(gl43);
         glMethodRedirects.putAll(gl44);
+        glMethodRedirects.putAll(gl45);
 
         // MINECRAFT
         methodRedirects.put(OpenGlHelper, RedirectMap.newMap()
@@ -470,6 +488,31 @@ public class GLSMRedirector {
             .add("glDrawArraysInstancedEXT", "glDrawArraysInstanced")
             .add("glDrawElementsInstancedEXT", "glDrawElementsInstanced")
         );
+        final var arbBufferObject = RedirectMap.newMap()
+            .add("glBindBufferARB", "glBindBuffer")
+            .add("glGenBuffersARB", "glGenBuffers")
+            .add("glDeleteBuffersARB", "glDeleteBuffers")
+            .add("glIsBufferARB", "glIsBuffer")
+            .add("glBufferDataARB", "glBufferData")
+            .add("glBufferSubDataARB", "glBufferSubData")
+            .add("glGetBufferSubDataARB", "glGetBufferSubData")
+            .add("glMapBufferARB", "glMapBuffer")
+            .add("glUnmapBufferARB", "glUnmapBuffer")
+            .add("glGetBufferParameterARB", "glGetBufferParameter")
+            .add("glGetBufferParameteriARB", "glGetBufferParameteri")
+            .add("glGetBufferParameterivARB", "glGetBufferParameteriv");
+        methodRedirects.put(ARBBufferObject, arbBufferObject);
+        methodRedirects.put(ARBVertexBufferObject, arbBufferObject);
+        methodRedirects.put(ARBBufferStorage, RedirectMap.newMap()
+            .add("glBufferStorage")
+        );
+        methodRedirects.put(ARBCopyBuffer, RedirectMap.newMap()
+            .add("glCopyBufferSubData")
+        );
+        methodRedirects.put(ARBMapBufferRange, RedirectMap.newMap()
+            .add("glMapBufferRange")
+            .add("glFlushMappedBufferRange")
+        );
 
         // APPLE
         methodRedirects.put(APPLEVertexArrayObject, RedirectMap.newMap()

glsm/src/main/java/com/gtnewhorizons/angelica/glsm/streaming/TessellatorStreamingDrawer.java

@@ -88,13 +88,18 @@ public class TessellatorStreamingDrawer {
         final int vertexSize = format.getVertexSize();
 
         final int requiredBytes = vertexCount * vertexSize;
-        ensureRepackCapacity(requiredBytes);
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            ensureRepackCapacity(requiredBytes);
 
-        final long writePtr = format.writeToBuffer0(repackAddress, tess.rawBuffer, tess.rawBufferIndex);
-        repackBuffer.position(0);
-        repackBuffer.limit((int)(writePtr - repackAddress));
+            final long writePtr = format.writeToBuffer0(repackAddress, tess.rawBuffer, tess.rawBufferIndex);
+            repackBuffer.position(0);
+            repackBuffer.limit((int)(writePtr - repackAddress));
 
-        uploadAndDraw(repackBuffer, flags, format, vertexSize, tess.drawMode, vertexCount);
+            uploadAndDraw(repackBuffer, flags, format, vertexSize, tess.drawMode, vertexCount);
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
+        }
 
         // Shrink rawBuffer if oversized
         if (tess.rawBufferSize > 0x20000 && tess.rawBufferIndex < (tess.rawBufferSize << 3)) {
@@ -187,24 +192,29 @@ public class TessellatorStreamingDrawer {
      * Tries the persistent ring buffer first, falls back to orphan buffer on overflow.
      */
     private static void uploadAndDraw(ByteBuffer packed, int flags, VertexFormat format, int vertexSize, int drawMode, int vertexCount) {
-        ensureVAO(flags, format);
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            ensureVAO(flags, format);
 
-        int firstVertex = -1;
+            int firstVertex = -1;
 
-        if (persistentBuffer != null) {
-            firstVertex = persistentBuffer.upload(packed, vertexSize);
+            if (persistentBuffer != null) {
+                firstVertex = persistentBuffer.upload(packed, vertexSize);
+            }
+
+            if (firstVertex >= 0) {
+                GLStateManager.glBindVertexArray(persistentVAOs[flags]);
+            } else {
+                GLStateManager.glBindVertexArray(orphanVAOs[flags]);
+                orphanBuffers[flags].upload(packed);
+                firstVertex = 0;
+            }
+
+            drawWithQuadConversion(drawMode, firstVertex, vertexCount);
+            GLStateManager.glBindVertexArray(0);
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
         }
-
-        if (firstVertex >= 0) {
-            GLStateManager.glBindVertexArray(persistentVAOs[flags]);
-        } else {
-            GLStateManager.glBindVertexArray(orphanVAOs[flags]);
-            orphanBuffers[flags].upload(packed);
-            firstVertex = 0;
-        }
-
-        drawWithQuadConversion(drawMode, firstVertex, vertexCount);
-        GLStateManager.glBindVertexArray(0);
     }
 
     private static void drawWithQuadConversion(int drawMode, int firstVertex, int vertexCount) {

glsm/src/test/java/com/gtnewhorizons/angelica/glsm/GLVersionParseTest.java

@@ -0,0 +1,34 @@
+package com.gtnewhorizons.angelica.glsm;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class GLVersionParseTest {
+
+    @Test
+    void parseMajorMinor() {
+        assertEquals(43, RenderSystem.parseMajorMinor("4.3.0 - Build 20.19.15.4835"));
+        assertEquals(46, RenderSystem.parseMajorMinor("4.6.0 NVIDIA 551.61"));
+        assertEquals(41, RenderSystem.parseMajorMinor("4.1 Metal - 88"));
+        assertEquals(33, RenderSystem.parseMajorMinor("3.3"));
+        assertEquals(46, RenderSystem.parseMajorMinor("4.6 (Core Profile) Mesa 24.0.3"));
+        assertEquals(-1, RenderSystem.parseMajorMinor(null));
+        assertEquals(-1, RenderSystem.parseMajorMinor(""));
+        assertEquals(-1, RenderSystem.parseMajorMinor("garbage"));
+        assertEquals(-1, RenderSystem.parseMajorMinor("OpenGL ES 3.2"));
+    }
+
+    @Test
+    void isContextValid() {
+        assertTrue(RenderSystem.isContextValid(4, 4, 46, true));
+        assertTrue(RenderSystem.isContextValid(4, 4, 44, true));
+        assertFalse(RenderSystem.isContextValid(4, 4, 43, true));
+        assertFalse(RenderSystem.isContextValid(4, 4, 44, false));
+        assertTrue(RenderSystem.isContextValid(4, 4, -1, true));
+        assertFalse(RenderSystem.isContextValid(4, 4, -1, false));
+        assertTrue(RenderSystem.isContextValid(3, 3, 33, true));
+    }
+}

glsm/src/test/java/com/gtnewhorizons/angelica/glsm/HugeFarPlaneFrustumTest.java

@@ -0,0 +1,82 @@
+package com.gtnewhorizons.angelica.glsm;
+
+import org.joml.FrustumIntersection;
+import org.joml.Matrix4f;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class HugeFarPlaneFrustumTest {
+
+    private static final float SECTION_HALF = 8.0f + 1.0f + 0.125f;
+    private static final float DEGENERATE_FAR = 2.147483648e9f;
+
+    private static Matrix4f combined(float zFar) {
+        final Matrix4f proj = new Matrix4f().perspective((float) Math.toRadians(70.0), 854.0f / 480.0f, 0.05f, zFar);
+        final Matrix4f mv = new Matrix4f()
+            .rotate((float) Math.toRadians(25.0), 1, 0, 0)
+            .rotate((float) Math.toRadians(123.0), 0, 1, 0)
+            .translate(0.0f, -1.62f, 0.0f);
+        return new Matrix4f().set(proj).mul(mv);
+    }
+
+    private static boolean sectionVisible(FrustumIntersection f, int sx, int sy, int sz) {
+        final float cx = sx * 16.0f + 8.0f;
+        final float cy = sy * 16.0f + 8.0f;
+        final float cz = sz * 16.0f + 8.0f;
+        return f.testAab(cx - SECTION_HALF, cy - SECTION_HALF, cz - SECTION_HALF, cx + SECTION_HALF, cy + SECTION_HALF, cz + SECTION_HALF);
+    }
+
+    @Test
+    void unnormalizedFrustumMatchesNormalFarPlane() {
+        final FrustumIntersection normal = new FrustumIntersection(combined(512.0f), false);
+        final FrustumIntersection huge = new FrustumIntersection(combined(DEGENERATE_FAR), false);
+
+        int visible = 0;
+        int mismatches = 0;
+        for (int x = -12; x <= 12; x++) {
+            for (int y = -4; y <= 4; y++) {
+                for (int z = -12; z <= 12; z++) {
+                    final boolean vNormal = sectionVisible(normal, x, y, z);
+                    if (vNormal) visible++;
+                    if (vNormal != sectionVisible(huge, x, y, z)) mismatches++;
+                }
+            }
+        }
+        assertTrue(visible > 100, "sanity check broken: normal frustum accepted only " + visible + " sections");
+        assertEquals(0, mismatches, "sections culled differently under the degenerate far plane");
+    }
+
+    @Test
+    void normalizedSetCullsEverythingOnDegenerateFarPlane() {
+        final FrustumIntersection normalized = new FrustumIntersection();
+        normalized.set(combined(DEGENERATE_FAR));
+
+        int visible = 0;
+        for (int x = -12; x <= 12; x++) {
+            for (int y = -4; y <= 4; y++) {
+                for (int z = -12; z <= 12; z++) {
+                    if (sectionVisible(normalized, x, y, z)) visible++;
+                }
+            }
+        }
+        assertEquals(0, visible, "set(m) with a degenerate far plane no longer culls everything");
+    }
+
+    @Test
+    void identityFrustumOnlyPassesCameraSection() {
+        final FrustumIntersection identity = new FrustumIntersection(new Matrix4f());
+        assertTrue(sectionVisible(identity, 0, 0, 0), "identity frustum rejected the camera's own section");
+        int visible = 0;
+        for (int x = -12; x <= 12; x++) {
+            for (int y = -4; y <= 4; y++) {
+                for (int z = -12; z <= 12; z++) {
+                    if (Math.abs(x) <= 1 && Math.abs(y) <= 1 && Math.abs(z) <= 1) continue;
+                    if (sectionVisible(identity, x, y, z)) visible++;
+                }
+            }
+        }
+        assertEquals(0, visible, "non-adjacent sections accepted by the identity frustum");
+    }
+}

glsm/src/test/java/com/gtnewhorizons/angelica/glsm/ImmediateModeThreadIsolationTest.java

@@ -0,0 +1,125 @@
+package com.gtnewhorizons.angelica.glsm;
+
+import com.gtnewhorizon.gtnhlib.client.renderer.DirectTessellator;
+import com.gtnewhorizons.angelica.glsm.recording.CompiledDisplayList;
+import com.gtnewhorizons.angelica.glsm.recording.GLCommand;
+import com.gtnewhorizons.angelica.glsm.recording.ImmediateModeRecorder;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.lwjgl.opengl.GL11;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+@ExtendWith(GLSMCoreExtension.class)
+class ImmediateModeThreadIsolationTest {
+
+    @Test
+    void backgroundThreadsGetDistinctTessellators() throws Exception {
+        final DirectTessellator mainTess = ImmediateModeRecorder.getInternalTessellator();
+        final AtomicReference<DirectTessellator> bg1 = new AtomicReference<>();
+        final AtomicReference<DirectTessellator> bg2 = new AtomicReference<>();
+
+        final Thread t1 = new Thread(() -> bg1.set(ImmediateModeRecorder.getInternalTessellator()), "iso-test-1");
+        final Thread t2 = new Thread(() -> bg2.set(ImmediateModeRecorder.getInternalTessellator()), "iso-test-2");
+        t1.start(); t2.start();
+        t1.join(); t2.join();
+
+        assertNotNull(bg1.get());
+        assertNotNull(bg2.get());
+        assertNotSame(mainTess, bg1.get(), "background thread must not share the main-thread tessellator");
+        assertNotSame(mainTess, bg2.get(), "background thread must not share the main-thread tessellator");
+        assertNotSame(bg1.get(), bg2.get(), "background threads must not share a tessellator");
+    }
+
+    @Test
+    void concurrentImmediateModeDoesNotCorruptRecording() throws Exception {
+        final List<Throwable> failures = new CopyOnWriteArrayList<>();
+        final CountDownLatch start = new CountDownLatch(1);
+        final AtomicBoolean stop = new AtomicBoolean(false);
+
+        final Runnable spam = () -> {
+            try {
+                start.await();
+                while (!stop.get()) {
+                    GLStateManager.glBegin(GL11.GL_QUADS);
+                    GLStateManager.glVertex3f(0, 0, 0);
+                    GLStateManager.glVertex3f(1, 0, 0);
+                    GLStateManager.glVertex3f(1, 1, 0);
+                    GLStateManager.glVertex3f(0, 1, 0);
+                    GLStateManager.glEnd();
+                }
+            } catch (Throwable t) {
+                failures.add(t);
+            }
+        };
+        final Thread t1 = new Thread(spam, "iso-spam-1");
+        final Thread t2 = new Thread(spam, "iso-spam-2");
+        t1.start(); t2.start();
+        start.countDown();
+
+        final List<Integer> lists = new ArrayList<>();
+        try {
+            for (int i = 0; i < 50; i++) {
+                final int list = GLStateManager.glGenLists(1);
+                GLStateManager.glNewList(list, GL11.GL_COMPILE);
+                GLStateManager.glBegin(GL11.GL_QUADS);
+                GLStateManager.glVertex3f(0, 0, 0);
+                GLStateManager.glVertex3f(1, 0, 0);
+                GLStateManager.glVertex3f(1, 1, 0);
+                GLStateManager.glVertex3f(0, 1, 0);
+                GLStateManager.glEnd();
+                GLStateManager.glEndList();
+                lists.add(list);
+            }
+        } finally {
+            stop.set(true);
+            t1.join(5000); t2.join(5000);
+        }
+
+        assertTrue(failures.isEmpty(), "background immediate mode threw: " + failures);
+        for (int list : lists) {
+            final CompiledDisplayList compiled = DisplayListManager.getDisplayList(list);
+            assertNotNull(compiled, "list " + list + " should be compiled");
+            assertEquals(1, compiled.getCommandCounts().getOrDefault(GLCommand.DRAW_RANGE, 0), "list " + list + " should contain exactly the main thread's draw");
+            GLStateManager.glDeleteLists(list, 1);
+        }
+    }
+
+    @Test
+    void sweepFreesDeadThreadTessellators() throws Exception {
+        final Thread t = new Thread(() -> ImmediateModeRecorder.getInternalTessellator(), "iso-sweep");
+        t.start();
+        t.join();
+        final int before = ImmediateModeRecorder.getThreadTessellatorCount();
+        assertTrue(before >= 1);
+        ImmediateModeRecorder.cleanupOrphanTessellators();
+        assertTrue(ImmediateModeRecorder.getThreadTessellatorCount() < before, "dead thread's tessellator should be swept");
+    }
+
+    @Test
+    void drawLockGatesOnSplashComplete() throws Exception {
+        assertFalse(GLStateManager.acquireDrawLock(), "post-splash acquire must be a no-op");
+
+        final Field f = GLStateManager.class.getDeclaredField("splashComplete");
+        f.setAccessible(true);
+        f.set(null, false);
+        try {
+            assertTrue(GLStateManager.acquireDrawLock(), "during splash the lock must engage");
+            GLStateManager.releaseDrawLock();
+        } finally {
+            f.set(null, true);
+        }
+    }
+}

lwjgl3-backend/build.gradle.kts

@@ -61,7 +61,7 @@ dependencies {
     api(project(":glsm"))
 
     compileOnly("com.github.GTNewHorizons:lwjgl3ify:3.0.15:dev") { isTransitive = false }
-    compileOnly("org.embeddedt.celeritas:celeritas-common:2.5.3-GTNH") { isTransitive = false }
+    compileOnly("org.embeddedt.celeritas:celeritas-common:2.5.5-GTNH") { isTransitive = false }
 
     val osName = System.getProperty("os.name").lowercase()
     val osArch = System.getProperty("os.arch").lowercase()

lwjgl3-backend/src/main/java/com/gtnewhorizons/angelica/lwjgl3/Lwjgl3GLRenderBackend.java

@@ -659,6 +659,11 @@ public final class Lwjgl3GLRenderBackend extends RenderBackend {
         GL11C.glGetTexImage(target, level, format, type, pixels);
     }
 
+    @Override
+    public void getTexImage(int target, int level, int format, int type, long pixelBufferOffset) {
+        GL11C.glGetTexImage(target, level, format, type, pixelBufferOffset);
+    }
+
     @Override
     public int getFramebufferAttachmentParameteri(int target, int attachment, int pname) {
         return GL30C.glGetFramebufferAttachmentParameteri(target, attachment, pname);
@@ -1096,6 +1101,11 @@ public final class Lwjgl3GLRenderBackend extends RenderBackend {
         return GL30C.glMapBufferRange(target, offset, length, access);
     }
 
+    @Override
+    public void flushMappedBufferRange(int target, long offset, long length) {
+        GL30C.glFlushMappedBufferRange(target, offset, length);
+    }
+
     @Override
     public int genVertexArrays() {
         return GL30C.glGenVertexArrays();
@@ -1281,6 +1291,11 @@ public final class Lwjgl3GLRenderBackend extends RenderBackend {
         return GL45C.glCreateBuffers();
     }
 
+    @Override
+    public void namedBufferData(int buffer, long size, int usage) {
+        GL45C.glNamedBufferData(buffer, size, usage);
+    }
+
     @Override
     public void namedBufferData(int buffer, ByteBuffer data, int usage) {
         GL45C.glNamedBufferData(buffer, data, usage);

src/main/java/com/gtnewhorizons/angelica/api/ExtCeleritasRenderBlocks.java

@@ -0,0 +1,9 @@
+package com.gtnewhorizons.angelica.api;
+
+public interface ExtCeleritasRenderBlocks {
+
+    boolean angelica$shouldApplyCeleritasAO();
+
+    void angelica$setApplyingCeleritasAO(boolean val);
+
+}

src/main/java/com/gtnewhorizons/angelica/client/font/BatchingFontRenderer.java

@@ -327,6 +327,15 @@ public class BatchingFontRenderer {
     private int fontAAStrengthLast = -1;
 
     private void flushBatch() {
+        final boolean locked = GLStateManager.acquireDrawLock();
+        try {
+            flushBatchInner();
+        } finally {
+            if (locked) GLStateManager.releaseDrawLock();
+        }
+    }
+
+    private void flushBatchInner() {
         if (vertexDataPos == 0) {
             clearBatch();
             return;

src/main/java/com/gtnewhorizons/angelica/client/font/FontProviderUnicode.java

@@ -2,17 +2,25 @@ package com.gtnewhorizons.angelica.client.font;
 
 import com.gtnewhorizons.angelica.config.FontConfig;
 import net.minecraft.client.Minecraft;
+import net.minecraft.client.resources.IReloadableResourceManager;
+import net.minecraft.client.resources.IResourceManager;
+import net.minecraft.client.resources.IResourceManagerReloadListener;
 import net.minecraft.util.ResourceLocation;
 
 import java.io.IOException;
 import java.io.InputStream;
 
-public final class FontProviderUnicode implements FontProvider {
+public final class FontProviderUnicode implements FontProvider, IResourceManagerReloadListener {
 
     private FontProviderUnicode() {
+        onResourceManagerReload(Minecraft.getMinecraft().getResourceManager());
+        ((IReloadableResourceManager) Minecraft.getMinecraft().getResourceManager()).registerReloadListener(this);
+    }
+
+    @Override
+    public void onResourceManagerReload(IResourceManager resourceManager) {
         try {
-            InputStream inputstream = Minecraft.getMinecraft().getResourceManager()
-                .getResource(new ResourceLocation("font/glyph_sizes.bin")).getInputStream();
+            InputStream inputstream = resourceManager.getResource(new ResourceLocation("font/glyph_sizes.bin")).getInputStream();
             //noinspection ResultOfMethodCallIgnored
             inputstream.read(this.glyphWidth);
         }

src/main/java/com/gtnewhorizons/angelica/client/font/FontStrategist.java

@@ -11,9 +11,13 @@ import net.minecraft.client.resources.DefaultResourcePack;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import cpw.mods.fml.common.Loader;
+
 import java.awt.Font;
+import java.awt.FontFormatException;
 import java.awt.GraphicsEnvironment;
 import java.io.File;
+import java.io.IOException;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -27,13 +31,13 @@ public class FontStrategist {
     public static final Logger LOGGER = LogManager.getLogger("Angelica");
 
     static {
+        HashMap<String, Font> fontSet = new HashMap<>();
+
         if (GraphicsEnvironment.isHeadless()) {
-            LOGGER.warn("GraphicsEnvironment.isHeadless() returned true! Custom fonts will be unavailable. This is likely a MacOS issue.");
-            availableFonts = new Font[0];
+            LOGGER.warn("GraphicsEnvironment.isHeadless() returned true! Only bundled fonts will be available. This is likely a MacOS issue.");
         } else {
             // get available fonts without duplicates (250 copies of dialog.plain need not apply)
             Font[] availableFontsDirty = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
-            HashMap<String, Font> fontSet = new HashMap<>();
             HashMultiset<String> duplicates = HashMultiset.create(); // for debugging
 
             for (Font font : availableFontsDirty) {
@@ -57,11 +61,14 @@ public class FontStrategist {
                 sb.append(". Some fonts may be missing from the font selection menu.");
                 LOGGER.warn(sb.toString());
             }
-            availableFonts = fontSet.values().stream().sorted(Comparator.comparing(Font::getFontName)).toArray(Font[]::new);
 
-            LOGGER.info("Got {} fonts from GraphicsEnvironment ({} after deduplication)", availableFontsDirty.length, availableFonts.length);
+            LOGGER.info("Got {} fonts from GraphicsEnvironment ({} after deduplication)", availableFontsDirty.length, fontSet.size());
         }
 
+        loadBundledFonts(fontSet);
+
+        availableFonts = fontSet.values().stream().sorted(Comparator.comparing(Font::getFontName)).toArray(Font[]::new);
+
         // create and add the resource pack that provides fonts
         HashMap<String, File> packMap = new HashMap<>();
         for (int i = 0; i < FontProviderCustom.ATLAS_COUNT; i++) {
@@ -74,6 +81,44 @@ public class FontStrategist {
         defaultResourcePacks.add(fontResourcePack);
     }
 
+    // Load .ttf/.otf shipped with the pack so customFontName* can point at a font that isn't installed
+    // on the system. fontfiles/ is SmoothFont's folder, kept so packs built for it work unchanged.
+    private static void loadBundledFonts(HashMap<String, Font> fontSet) {
+        File configDir = Loader.instance().getConfigDir();
+        if (configDir == null) {
+            LOGGER.warn("Loader.instance().getConfigDir() returned null. Bundled fonts will not be loaded.");
+            return;
+        }
+        File parent = configDir.getParentFile();
+        File[] fontDirs = { new File(parent, "fontfiles"), new File(configDir, "angelica/fonts") };
+        GraphicsEnvironment ge = GraphicsEnvironment.isHeadless() ? null : GraphicsEnvironment.getLocalGraphicsEnvironment();
+        int loaded = 0;
+        for (File dir : fontDirs) {
+            File[] files = dir.listFiles((d, name) -> name.toLowerCase().endsWith(".ttf") || name.toLowerCase().endsWith(".otf"));
+            if (files == null) continue;
+            for (File file : files) {
+                try {
+                    Font font = Font.createFont(Font.TRUETYPE_FONT, file);
+                    String name = font.getFontName();
+                    if (fontSet.containsKey(name)) {
+                        String deduped = name;
+                        int n = 1;
+                        while (fontSet.containsKey(deduped)) deduped = name + "_" + n++;
+                        LOGGER.warn("Font name {} (from {}) is already registered; registering this one as {}", name, file.getName(), deduped);
+                        name = deduped;
+                    }
+                    if (ge != null) ge.registerFont(font);
+                    fontSet.put(name, font);
+                    loaded++;
+                    LOGGER.info("Loaded font {} from {}/{}", name, dir.getName(), file.getName());
+                } catch (FontFormatException | IOException e) {
+                    LOGGER.error("Couldn't load font {}", file.getPath(), e);
+                }
+            }
+        }
+        if (loaded > 0) LOGGER.info("Loaded {} bundled font(s) from the pack", loaded);
+    }
+
     /**
      Lets you get a FontProvider per char while respecting font priority and fallbacks, the unicode flag, whether
      SGA is on, if we're in a splash screen, if a font can even display a character in the first place, etc.

src/main/java/com/gtnewhorizons/angelica/compat/ModStatus.java

@@ -1,13 +1,14 @@
 package com.gtnewhorizons.angelica.compat;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import com.falsepattern.endlessids.config.GeneralConfig;
 import com.gtnewhorizons.angelica.compat.backhand.BackhandReflectionCompat;
 import com.gtnewhorizons.angelica.helpers.LoadControllerHelper;
+import com.gtnewhorizons.angelica.rendering.celeritas.CubeStatusEvents;
 import cpw.mods.fml.common.Loader;
 import cpw.mods.fml.common.versioning.DefaultArtifactVersion;
 import mods.battlegear2.Battlegear;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 
 public class ModStatus {
     public static final Logger LOGGER = LogManager.getLogger("ModCompat");
@@ -29,6 +30,7 @@ public class ModStatus {
     public static boolean isBaublesLoaded;
     public static boolean isCosmeticArmorReworkedLoaded;
     public static boolean isFluidLoggedLoaded;
+    public static boolean isCubicChunksLoaded;
     public static boolean isBOPLoaded;
     public static boolean isEtFuturumLoaded;
 
@@ -50,6 +52,7 @@ public class ModStatus {
         isBaublesLoaded = Loader.isModLoaded("Baubles");
         isCosmeticArmorReworkedLoaded = Loader.isModLoaded("cosmeticarmorreworked");
         isFluidLoggedLoaded = Loader.isModLoaded("fluidlogged");
+        isCubicChunksLoaded = Loader.isModLoaded("cubicchunks");
         isEtFuturumLoaded = Loader.isModLoaded("etfuturum");
 
         isHoloInventoryLoaded = Loader.isModLoaded("holoinventory");
@@ -71,6 +74,10 @@ public class ModStatus {
             }
         }
 
+        if (isCubicChunksLoaded) {
+            CubeStatusEvents.init();
+        }
+
         boolean eidBlockItemExtended = false;
         boolean eidBiomeExtended = false;
         if (isEIDLoaded) {

src/main/java/com/gtnewhorizons/angelica/compat/cubicchunks/CubicChunksAPI.java

@@ -0,0 +1,44 @@
+package com.gtnewhorizons.angelica.compat.cubicchunks;
+
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.storage.ExtendedBlockStorage;
+
+import com.cardinalstar.cubicchunks.api.IColumn;
+import com.cardinalstar.cubicchunks.api.ICube;
+import com.cardinalstar.cubicchunks.world.ICubicWorld;
+import com.cardinalstar.cubicchunks.world.cube.Cube;
+import com.cardinalstar.cubicchunks.world.cube.ICubeProviderInternal;
+import com.gtnewhorizons.angelica.compat.mojang.ChunkSectionPos;
+
+public class CubicChunksAPI {
+
+    public static ExtendedBlockStorage getCubeStorage(World world, int x, int y, int z) {
+        Cube cube = ((ICubeProviderInternal) world.getChunkProvider()).getLoadedCube(x, y, z);
+
+        if (cube == null || cube.isEmpty()) return null;
+
+        return cube.getStorage();
+    }
+
+    public static int[] getLoadedCubeLevelsInColumn(World world, int chunkX, int chunkZ) {
+        IColumn column = (IColumn) world.getChunkFromChunkCoords(chunkX, chunkZ);
+
+        return column.getLoadedCubes().stream().mapToInt(ICube::getY).toArray();
+    }
+
+    public static int getMinHeight(World world) {
+        return ((ICubicWorld) world).getMinHeight();
+    }
+
+    public static int getMaxHeight(World world) {
+        return ((ICubicWorld) world).getMaxHeight();
+    }
+
+    public static int getMinSectionY(World world) {
+        return ChunkSectionPos.getSectionCoord(getMinHeight(world));
+    }
+
+    public static int getMaxSectionYExclusive(World world) {
+        return ChunkSectionPos.getSectionCoord(getMaxHeight(world) - 1) + 1;
+    }
+}

src/main/java/com/gtnewhorizons/angelica/compat/etfuturum/EndFlashCompat.java

@@ -0,0 +1,30 @@
+package com.gtnewhorizons.angelica.compat.etfuturum;
+
+import cpw.mods.fml.common.Loader;
+import ganymedes01.etfuturum.api.client.EndFlashAPI;
+
+/**
+ * Use EFR to power End flash uniforms.
+ */
+public final class EndFlashCompat {
+
+    private static final boolean AVAILABLE = Loader.isModLoaded("etfuturum") && EndFlashCompat.class.getResource("/ganymedes01/etfuturum/api/client/EndFlashAPI.class") != null;
+
+    private EndFlashCompat() {}
+
+    public static boolean isAvailable() {
+        return AVAILABLE;
+    }
+
+    public static float getIntensity(float partialTicks) {
+        return AVAILABLE ? EndFlashAPI.getIntensity(partialTicks) : 0.0F;
+    }
+
+    public static float getXAngle() {
+        return AVAILABLE ? EndFlashAPI.getXAngle() : 0.0F;
+    }
+
+    public static float getYAngle() {
+        return AVAILABLE ? EndFlashAPI.getYAngle() : 0.0F;
+    }
+}

src/main/java/com/gtnewhorizons/angelica/compat/lotr/LOTRCompat.java

@@ -0,0 +1,22 @@
+package com.gtnewhorizons.angelica.compat.lotr;
+
+import net.minecraft.world.WorldProvider;
+
+public final class LOTRCompat {
+
+    private static final Class<?> LOTR_WORLD_PROVIDER_CLASS;
+
+    static {
+        Class<?> clazz = null;
+        try {
+            clazz = Class.forName("lotr.common.world.LOTRWorldProvider", false, LOTRCompat.class.getClassLoader());
+        } catch (ClassNotFoundException ignored) {}
+        LOTR_WORLD_PROVIDER_CLASS = clazz;
+    }
+
+    private LOTRCompat() {}
+
+    public static boolean isLotrProvider(WorldProvider provider) {
+        return LOTR_WORLD_PROVIDER_CLASS != null && LOTR_WORLD_PROVIDER_CLASS.isInstance(provider);
+    }
+}

src/main/java/com/gtnewhorizons/angelica/compat/mojang/ChunkSectionPos.java

@@ -1,8 +1,10 @@
 package com.gtnewhorizons.angelica.compat.mojang;
 
-import com.gtnewhorizon.gtnhlib.blockpos.BlockPos;
 import org.joml.Vector3i;
 
+import com.gtnewhorizon.gtnhlib.blockpos.BlockPos;
+import com.gtnewhorizon.gtnhlib.util.CoordinatePacker;
+
 // See if we can merge/mixin/extend ChunkPosition maybe?
 public class ChunkSectionPos extends Vector3i {
 
@@ -25,11 +27,8 @@ public class ChunkSectionPos extends Vector3i {
     }
 
     public static long asLong(int x, int y, int z) {
-        long l = 0L;
-        l |= ((long)x & 4194303L) << 42;
-        l |= ((long)y & 1048575L) << 0;
-        l |= ((long)z & 4194303L) << 20;
-        return l;
+        // Use CoordinatePacker so that cubic chunks can change the bit packing layout
+        return CoordinatePacker.pack(x, y, z);
     }
 
     public static int getLocalCoord(int coord) {

src/main/java/com/gtnewhorizons/angelica/compat/mojang/CompatMathHelper.java

@@ -1,5 +1,9 @@
 package com.gtnewhorizons.angelica.compat.mojang;
 
+import net.minecraft.util.MathHelper;
+
+import com.gtnewhorizons.angelica.compat.ModStatus;
+
 public class CompatMathHelper {
     public static int smallestEncompassingPowerOfTwo(int value) {
         int j = value - 1;
@@ -24,4 +28,13 @@ public class CompatMathHelper {
             return k == 0 ? value : value + divisor - k;
         }
     }
+
+    public static int clampHeight(int y) {
+        if (ModStatus.isCubicChunksLoaded) {
+            // no clamping
+            return y;
+        } else {
+            return MathHelper.clamp_int(y, 0, 255);
+        }
+    }
 }

src/main/java/com/gtnewhorizons/angelica/mixins/Mixins.java

@@ -83,6 +83,13 @@ public enum Mixins implements IMixins {
             .addClientMixins("angelica.vbo.MixinRenderGlobal")
     ),
 
+    ANGELICA_VBO_CLOUDS_FAR_PLANE(
+        new MixinBuilder()
+            .setApplyIf(() -> AngelicaConfig.enableVBOClouds && !AngelicaConfig.enableNotFineFeatures)
+            .setPhase(Phase.EARLY)
+            .addClientMixins("notfine.clouds.MixinEntityRenderer")
+    ),
+
     ANGELICA_PANORAMA_BLUR(
         new MixinBuilder("Replace main menu panorama with modern equivalent")
             .setPhase(Phase.EARLY)
@@ -204,6 +211,8 @@ public enum Mixins implements IMixins {
         .addClientMixins(
             "rendering.MixinBlock"
             , "rendering.MixinBlockFluidBase"
+            , "rendering.MixinBlockLiquid"
+            , "rendering.BlockLiquidFlowInvoker"
             , "rendering.AccessorBiomeColorEvent"
             , "rendering.MixinBiomeGenBase"
             , "rendering.MixinChunk"
@@ -231,8 +240,7 @@ public enum Mixins implements IMixins {
         .setPhase(Phase.EARLY)
         .setApplyIf(() -> AngelicaConfig.enableCeleritas)
         .addClientMixins(
-              "celeritas.terrain.ChunkTrackerAccessor"
-            , "celeritas.terrain.MixinChunkProviderClient"
+              "celeritas.terrain.MixinChunkProviderClient"
             , "celeritas.terrain.MixinMinecraft_ChunkUpdates"
             , "celeritas.terrain.MixinRenderGlobal"
             , "celeritas.terrain.MixinRenderSectionManager"
@@ -299,6 +307,8 @@ public enum Mixins implements IMixins {
             , "shaders.MixinTileEntityRendererDispatcher"
             , "shaders.MixinGlProgram"
             , "shaders.MixinTextureManager_ReloadCount"
+            , "shaders.AccessorModelBox"
+            , "shaders.MixinModelBiped"
         )
     ),
 
@@ -407,6 +417,12 @@ public enum Mixins implements IMixins {
         .setApplyIf(() -> AngelicaConfig.removeUnicodeEvenScaling)
         .addClientMixins("angelica.bugfixes.MixinScaledResolution_UnicodeFix")),
 
+    FARSEEK_WORLDSLICE_COMPAT(new MixinBuilder("Let Farseek resolve celeritas' WorldSlice so Streams' water renders properly")
+        .setPhase(Phase.LATE)
+        .addRequiredMod(TargetedMod.FARSEEK)
+        .setApplyIf(() -> AngelicaConfig.enableCeleritas)
+        .addClientMixins("client.farseek.MixinFarseekIBlockAccessValue")),
+
     SECURITYCRAFT_COMPAT(new MixinBuilder("Fix reflection in SecurityCraft for compat with Angelica")
         .setPhase(Phase.LATE)
         .addRequiredMod(TargetedMod.SECURITYCRAFT)

src/main/java/com/gtnewhorizons/angelica/mixins/TargetedMod.java

@@ -17,6 +17,7 @@ public enum TargetedMod implements ITargetMod {
     DRAGON_API("Reika.DragonAPI.Auxiliary.DragonAPIASMHandler", "DragonAPI"),
     ET_FUTURUM_REQUIEM(null, "etfuturum"),
     EXTRAUTILS(null, "ExtraUtilities"),
+    FARSEEK("farseek.core.FarseekCoreMod", "farseek"),
     FALSETWEAKS("com.falsepattern.falsetweaks.asm.CoreLoadingPlugin", "falsetweaks"),
     MINEFACTORY_RELOADED(null, "MineFactoryReloaded"),
     NTM_SPACE("com.hbm.dim.SolarSystem"),

src/main/java/com/gtnewhorizons/angelica/mixins/interfaces/ChunkTrackerAccessor.java

@@ -1,12 +0,0 @@
-package com.gtnewhorizons.angelica.mixins.interfaces;
-
-import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap;
-import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
-import it.unimi.dsi.fastutil.longs.LongSet;
-
-public interface ChunkTrackerAccessor {
-    Long2IntOpenHashMap angelica$getChunkStatus();
-    LongOpenHashSet angelica$getChunkReady();
-    LongSet angelica$getUnloadQueue();
-    LongSet angelica$getLoadQueue();
-}

src/main/java/com/gtnewhorizons/angelica/mixins/interfaces/ClippingHelperExt.java

@@ -1,8 +1,11 @@
 package com.gtnewhorizons.angelica.mixins.interfaces;
 
 import org.joml.FrustumIntersection;
+import org.joml.Matrix4fc;
 
 public interface ClippingHelperExt {
     FrustumIntersection celeritas$getFrustumIntersection();
     void celeritas$updateFrustumIntersection();
+
+    Matrix4fc celeritas$getCombinedMatrix();
 }

src/main/java/com/gtnewhorizons/angelica/mixins/interfaces/IChunkTileEntityMapHolder.java

@@ -1,6 +1,10 @@
 package com.gtnewhorizons.angelica.mixins.interfaces;
 
 import com.gtnewhorizons.angelica.utils.ConcurrentTileEntityMap;
+import java.util.Map;
+
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.world.ChunkPosition;
 
 public interface IChunkTileEntityMapHolder {
     ConcurrentTileEntityMap angelica$getConcurrentTEMap();

src/main/java/com/gtnewhorizons/angelica/proxy/ClientProxy.java

@@ -1,5 +1,35 @@
 package com.gtnewhorizons.angelica.proxy;
 
+import static com.gtnewhorizons.angelica.AngelicaMod.MOD_ID;
+
+import java.lang.management.ManagementFactory;
+import java.util.Locale;
+import java.util.concurrent.ConcurrentHashMap;
+
+import net.minecraft.block.Block;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiMainMenu;
+import net.minecraft.client.gui.GuiScreen;
+import net.minecraft.client.gui.GuiVideoSettings;
+import net.minecraft.client.network.NetHandlerPlayClient;
+import net.minecraft.server.integrated.IntegratedServer;
+import net.minecraft.util.Direction;
+import net.minecraft.util.MathHelper;
+import net.minecraft.util.MovingObjectPosition;
+import net.minecraft.world.EnumSkyBlock;
+import net.minecraft.world.chunk.Chunk;
+import net.minecraftforge.client.ClientCommandHandler;
+import net.minecraftforge.client.event.EntityViewRenderEvent;
+import net.minecraftforge.client.event.FOVUpdateEvent;
+import net.minecraftforge.client.event.GuiOpenEvent;
+import net.minecraftforge.client.event.GuiScreenEvent;
+import net.minecraftforge.client.event.RenderGameOverlayEvent;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.event.world.WorldEvent;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
 import biomesoplenty.api.content.BOPCBlocks;
 import com.google.common.base.Objects;
 import com.gtnewhorizon.gtnhlib.client.model.loading.ModelRegistry;
@@ -8,6 +38,7 @@ import com.gtnewhorizons.angelica.commands.AngelicaCommand;
 import com.gtnewhorizons.angelica.common.BlockError;
 import com.gtnewhorizons.angelica.compat.ModStatus;
 import com.gtnewhorizons.angelica.compat.bettercrashes.BetterCrashesCompat;
+import com.gtnewhorizons.angelica.compat.mojang.CompatMathHelper;
 import com.gtnewhorizons.angelica.config.AngelicaConfig;
 import com.gtnewhorizons.angelica.rendering.TileEntityRenderBoundsRegistry;
 import com.gtnewhorizons.angelica.config.CompatConfig;
@@ -53,34 +84,6 @@ import me.jellysquid.mods.sodium.client.gui.SodiumGameOptions;
 import me.jellysquid.mods.sodium.client.gui.SodiumOptionsGUI;
 import net.coderbot.iris.Iris;
 import net.coderbot.iris.client.IrisDebugScreenHandler;
-import net.minecraft.block.Block;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.GuiMainMenu;
-import net.minecraft.client.gui.GuiScreen;
-import net.minecraft.client.gui.GuiVideoSettings;
-import net.minecraft.client.network.NetHandlerPlayClient;
-import net.minecraft.server.integrated.IntegratedServer;
-import net.minecraft.util.Direction;
-import net.minecraft.util.MathHelper;
-import net.minecraft.util.MovingObjectPosition;
-import net.minecraft.world.EnumSkyBlock;
-import net.minecraft.world.chunk.Chunk;
-import net.minecraftforge.client.ClientCommandHandler;
-import net.minecraftforge.client.event.EntityViewRenderEvent;
-import net.minecraftforge.client.event.FOVUpdateEvent;
-import net.minecraftforge.client.event.GuiOpenEvent;
-import net.minecraftforge.client.event.GuiScreenEvent;
-import net.minecraftforge.client.event.RenderGameOverlayEvent;
-import net.minecraftforge.common.MinecraftForge;
-import net.minecraftforge.event.world.WorldEvent;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
-
-import java.lang.management.ManagementFactory;
-import java.util.Locale;
-import java.util.concurrent.ConcurrentHashMap;
-
-import static com.gtnewhorizons.angelica.AngelicaMod.MOD_ID;
 
 public final class ClientProxy extends CommonProxy {
 
@@ -293,10 +296,10 @@ public final class ClientProxy extends CommonProxy {
                     event.left.set(i + 4, String.format(
                         "lc: %d b: %s bl: %d sl: %d rl: %d",
                         chunk.getTopFilledSegment() + 15,
-                        chunk.getBiomeGenForWorldCoords(bX & 15, bZ & 15, mc.theWorld.getWorldChunkManager()).biomeName,
-                        chunk.getSavedLightValue(EnumSkyBlock.Block, bX & 15, MathHelper.clamp_int(bY, 0, 255), bZ & 15),
-                        chunk.getSavedLightValue(EnumSkyBlock.Sky, bX & 15, MathHelper.clamp_int(bY, 0, 255), bZ & 15),
-                        chunk.getBlockLightValue(bX & 15, MathHelper.clamp_int(bY, 0, 255), bZ & 15, 0)));
+                        this.mc.theWorld.getBiomeGenForCoords(bX & 15, bZ & 15).biomeName,
+                        chunk.getSavedLightValue(EnumSkyBlock.Block, bX & 15, CompatMathHelper.clampHeight(bY), bZ & 15),
+                        chunk.getSavedLightValue(EnumSkyBlock.Sky, bX & 15, CompatMathHelper.clampHeight(bY), bZ & 15),
+                        chunk.getBlockLightValue(bX & 15, CompatMathHelper.clampHeight(bY), bZ & 15, 0)));
                 }
             }
             // Draw a frametime graph

src/main/java/com/gtnewhorizons/angelica/render/CloudRenderer.java

@@ -26,6 +26,7 @@ import com.gtnewhorizon.gtnhlib.client.renderer.vao.IVertexArrayObject;
 import com.gtnewhorizon.gtnhlib.client.renderer.vao.VertexBufferType;
 import com.gtnewhorizon.gtnhlib.client.renderer.vertex.DefaultVertexFormat;
 import com.gtnewhorizons.angelica.glsm.GLStateManager;
+import com.gtnewhorizons.angelica.glsm.states.FogState;
 import jss.notfine.core.Settings;
 import jss.notfine.gui.options.named.GraphicsQualityOff;
 import net.coderbot.iris.Iris;
@@ -48,6 +49,7 @@ import org.embeddedt.embeddium.impl.gl.shader.ShaderType;
 import org.embeddedt.embeddium.impl.render.shader.ShaderLoader;
 import org.joml.Matrix4f;
 import org.joml.Matrix4fStack;
+import org.joml.Vector3d;
 import org.lwjgl.BufferUtils;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.GL12;
@@ -79,6 +81,8 @@ public class CloudRenderer implements IResourceManagerReloadListener {
 
     private static final float SCROLL_SPEED = 1.0f / 256.0f;
     private static final float EDGE_OVERLAP = 0.0001f;
+    private static final float INTERIOR_INSET = EDGE_OVERLAP * 8.0f;
+    private static final float MAX_FAR_PLANE_DISTANCE = 65536.0f;
 
     private static final boolean BIG_ENDIAN = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;
 
@@ -106,12 +110,13 @@ public class CloudRenderer implements IResourceManagerReloadListener {
     private int anchorCellX = Integer.MIN_VALUE, anchorCellZ = Integer.MIN_VALUE;
     private int anchorMarginCells = 0;
     private int cachedEdgesGeneration = Integer.MIN_VALUE;
-    private boolean cachedEmitTopFace, cachedEmitBottomFace, cachedCameraInsideCloud;
+    private boolean cachedEmitTopFace, cachedEmitBottomFace;
     private int cachedRenderRadius = -1;
     private float cachedCloudInteriorHeight = Float.NaN;
     private boolean geomBuilt;
 
     private int cloudMode = -1, renderDistance = -1, cloudElevation = -1, scaleMult = -1;
+    private boolean enabled;
 
     private ByteBuffer emitBuffer;
     private long emitBufferAddr;
@@ -140,6 +145,7 @@ public class CloudRenderer implements IResourceManagerReloadListener {
 
     private GlProgram<CloudUniforms> program;
     private final Matrix4f mvpScratch = new Matrix4f();
+    private final Matrix4f mvScratch = new Matrix4f();
 
     public CloudRenderer() {
         ((IReloadableResourceManager) mc.getResourceManager()).registerReloadListener(this);
@@ -164,10 +170,13 @@ public class CloudRenderer implements IResourceManagerReloadListener {
         final GraphicsQualityOff cloudGraphicsQuality = (GraphicsQualityOff) Settings.MODE_CLOUDS.option.getStore();
         final int cloudQualitySetting = cloudGraphicsQuality == GraphicsQualityOff.FANCY
             || cloudGraphicsQuality == GraphicsQualityOff.DEFAULT && mc.gameSettings.fancyGraphics ? 2 : 1;
+        final float dimCloudHeight = mc.theWorld == null ? 128.0f : mc.theWorld.provider.getCloudHeight();
+        final boolean finiteCloudHeight = Float.isFinite(dimCloudHeight);
         final boolean newEnabled = cloudGraphicsQuality != GraphicsQualityOff.OFF
             && mc.gameSettings.shouldRenderClouds()
             && mc.theWorld != null
-            && mc.theWorld.provider.isSurfaceWorld();
+            && mc.theWorld.provider.isSurfaceWorld()
+            && finiteCloudHeight;
         final int targetDistance = Math.max(mc.gameSettings.renderDistanceChunks, (int) Settings.RENDER_DISTANCE_CLOUDS.option.getStore());
         final int cloudScaleMult = (int) Settings.CLOUD_SCALE.option.getStore();
 
@@ -178,11 +187,12 @@ public class CloudRenderer implements IResourceManagerReloadListener {
             invalidateGeometry();
         }
 
+        enabled = newEnabled;
         cloudMode = cloudQualitySetting;
         renderDistance = targetDistance;
         scaleMult = cloudScaleMult;
 
-        cloudElevation = mc.theWorld == null ? 128 : (int) mc.theWorld.provider.getCloudHeight();
+        cloudElevation = finiteCloudHeight ? (int) dimCloudHeight : 128;
         // Allows the setting to work with RFG and similar without hardcoding.
         // The minimum height check is so stuff like Aether cloud height doesn't get messed up.
         if (cloudElevation >= 96) {
@@ -190,6 +200,26 @@ public class CloudRenderer implements IResourceManagerReloadListener {
         }
     }
 
+    /**
+     * Far-plane distance needed so none of the cloud geometry gets clipped.
+     */
+    public float getRequiredFarPlaneDistance() {
+        if (!enabled || scaleMult <= 0 || renderDistance <= 0) return 0.0f;
+        if (mc.theWorld == null) return 0.0f;
+        final float cloudInteriorWidth = 12.0f * scaleMult;
+        final int renderRadius = (int) Math.ceil(renderDistance * 64.0f / (CELLS_PER_CHUNK * cloudInteriorWidth));
+        final int marginCells = Math.max(CELLS_PER_CHUNK, renderRadius * CELLS_PER_CHUNK / 4);
+        final int marginChunks = (marginCells + CELLS_PER_CHUNK - 1) / CELLS_PER_CHUNK;
+        float radiusBlocks = (renderRadius + marginChunks) * CELLS_PER_CHUNK * cloudInteriorWidth;
+        if (cloudMode != 2) radiusBlocks *= (float) Math.sqrt(2);
+        float verticalSlack = cloudElevation;
+        final Entity view = mc.renderViewEntity;
+        if (view != null) {
+            verticalSlack = Math.abs(cloudElevation + 0.33f - (float) view.posY) + 4.0f * scaleMult;
+        }
+        return Math.min(radiusBlocks + verticalSlack, MAX_FAR_PLANE_DISTANCE);
+    }
+
     private void invalidateGeometry() {
         anchorCellX = Integer.MIN_VALUE;
         anchorCellZ = Integer.MIN_VALUE;
@@ -220,23 +250,27 @@ public class CloudRenderer implements IResourceManagerReloadListener {
         program.unbind();
     }
 
-    private void uploadFogUniforms(float partialTicks, int renderRadius, float cloudInteriorWidth) {
+    private void uploadFogUniforms() {
         final CloudUniforms u = program.getInterface();
         final boolean fogEnabled = GLStateManager.getFogMode().isEnabled();
         u.setFogEnabled(fogEnabled);
-        if (fogEnabled) {
-            final float start = renderDistance * 16.0f;
-            final float end = renderRadius * CELLS_PER_CHUNK * cloudInteriorWidth;
-            final float range = end - start;
-            u.setFogParams(range != 0.0f ? -1.0f / range : 0.0f, range != 0.0f ? end / range : 1.0f);
-            final Vec3 sky = mc.theWorld.getSkyColor(mc.renderViewEntity, partialTicks);
-            u.setFogColor((float) sky.xCoord, (float) sky.yCoord, (float) sky.zCoord);
+        if (!fogEnabled) return;
+        final FogState fog = GLStateManager.getFogState();
+        final Vector3d color = fog.getFogColor();
+        u.setFogColor((float) color.x, (float) color.y, (float) color.z);
+        switch (fog.getFogMode()) {
+            case GL11.GL_LINEAR -> {
+                final float range = fog.getEnd() - fog.getStart();
+                u.setFogParams(range != 0.0f ? -1.0f / range : 0.0f, range != 0.0f ? fog.getEnd() / range : 1.0f, 0.0f, 0.0f);
+            }
+            case GL11.GL_EXP -> u.setFogParams(0.0f, 0.0f, fog.getDensity(), 1.0f);
+            default -> u.setFogParams(0.0f, 0.0f, fog.getDensity(), 2.0f);
         }
     }
 
     public boolean render(int cloudTicks, float partialTicks) {
         if (mc.theWorld == null || mc.renderViewEntity == null) return false;
-        if (cloudMode != 2 || scaleMult <= 0) return false;
+        if (!enabled || scaleMult <= 0) return false;
 
         final WorldRenderingPipeline pipeline = Iris.getPipelineManager().getPipelineNullable();
         if (pipeline != null && pipeline.getCloudSetting() == CloudSetting.OFF) return false;
@@ -274,32 +308,31 @@ public class CloudRenderer implements IResourceManagerReloadListener {
 
         final boolean emitTopFace = cameraRelativeY + cloudInteriorHeight >= 0.0F;
         final boolean emitBottomFace = cameraRelativeY <= 0.0F;
-        final boolean cameraInsideY = cameraRelativeY <= 0.0F && cameraRelativeY + cloudInteriorHeight >= 0.0F;
-        final boolean cameraInsideCloud = cameraInsideY && edges.cellOpaque(anchorX, anchorZ);
 
         final int renderRadius = (int) Math.ceil(renderDistance * 64.0f / (CELLS_PER_CHUNK * cloudInteriorWidth));
 
+        final boolean insideBand = cloudMode == 2 && emitTopFace && emitBottomFace;
         final boolean anchorInRange = geomBuilt
-            && Math.abs(anchorX - anchorCellX) <= anchorMarginCells
-            && Math.abs(anchorZ - anchorCellZ) <= anchorMarginCells;
+            && (insideBand
+                ? anchorX == anchorCellX && anchorZ == anchorCellZ
+                : Math.abs(anchorX - anchorCellX) <= anchorMarginCells
+                    && Math.abs(anchorZ - anchorCellZ) <= anchorMarginCells);
         final boolean geomCacheValid = anchorInRange
             && cachedEdgesGeneration == edgesGeneration
             && cachedEmitTopFace == emitTopFace
             && cachedEmitBottomFace == emitBottomFace
-            && cachedCameraInsideCloud == cameraInsideCloud
             && cachedRenderRadius == renderRadius
             && cachedCloudInteriorHeight == cloudInteriorHeight;
 
         if (!geomCacheValid) {
-            final int marginCells = cameraInsideCloud ? 0 : Math.max(CELLS_PER_CHUNK, renderRadius * CELLS_PER_CHUNK / 4);
-            rebuildGeometry(anchorX, anchorZ, renderRadius, cloudInteriorHeight, emitTopFace, emitBottomFace, cameraInsideCloud, marginCells);
+            final int marginCells = Math.max(CELLS_PER_CHUNK, renderRadius * CELLS_PER_CHUNK / 4);
+            rebuildGeometry(anchorX, anchorZ, renderRadius, cloudInteriorHeight, emitTopFace, emitBottomFace, marginCells);
             anchorCellX = anchorX;
             anchorCellZ = anchorZ;
             anchorMarginCells = marginCells;
             cachedEdgesGeneration = edgesGeneration;
             cachedEmitTopFace = emitTopFace;
             cachedEmitBottomFace = emitBottomFace;
-            cachedCameraInsideCloud = cameraInsideCloud;
             cachedRenderRadius = renderRadius;
             cachedCloudInteriorHeight = cloudInteriorHeight;
             geomBuilt = true;
@@ -308,8 +341,12 @@ public class CloudRenderer implements IResourceManagerReloadListener {
         if (vao == null || cachedVertexCount == 0) return true;
 
         GLStateManager.glActiveTexture(GL13.GL_TEXTURE0);
-        mc.renderEngine.bindTexture(texture);
-        if (!textureSetupDone) setupCloudTexture();
+        if (cloudTexId != -1 && !textureSetupDone) {
+            GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, cloudTexId);
+        } else {
+            mc.renderEngine.bindTexture(texture);
+            if (!textureSetupDone) setupCloudTexture();
+        }
 
         final Vec3 color = mc.theWorld.getCloudColour(partialTicks);
         float r = (float) color.xCoord;
@@ -346,10 +383,12 @@ public class CloudRenderer implements IResourceManagerReloadListener {
             mv.pushMatrix();
             mv.scale(cloudInteriorWidth, 1.0f, cloudInteriorWidth);
             mv.translate(-(cameraRelativeX + anchorDriftX), cameraRelativeY, -(cameraRelativeZ + anchorDriftZ));
+            mvScratch.set(mv);
             GLStateManager.getProjectionMatrix().mul(mv, mvpScratch);
             mv.popMatrix();
             u.mvp.set(mvpScratch);
-            uploadFogUniforms(partialTicks, renderRadius, cloudInteriorWidth);
+            u.mv.set(mvScratch);
+            uploadFogUniforms();
 
             drawAllFactors(r, g, b, false);
             program.unbind();
@@ -371,15 +410,13 @@ public class CloudRenderer implements IResourceManagerReloadListener {
     private void drawAllFactors(float r, float g, float b, boolean shadersActive) {
         vao.bind();
         GLStateManager.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, eboId);
+        GLStateManager.disableCull();
 
         GLStateManager.disableBlend();
         GLStateManager.glDepthMask(true);
         GLStateManager.glColorMask(false, false, false, false);
-        // Depth prepass: alpha must match color pass so discard threshold writes same depth coverage.
         if (shadersActive) {
             GLStateManager.glColor4f(1.0f, 1.0f, 1.0f, CloudUniforms.ALPHA);
-        } else {
-            program.getInterface().setColorMult(1.0f, 1.0f, 1.0f);
         }
         final int totalQuads = cachedVertexCount / 4;
         GLStateManager.glDrawElements(GL11.GL_TRIANGLES, totalQuads * 6, GL11.GL_UNSIGNED_INT, 0L);
@@ -412,25 +449,32 @@ public class CloudRenderer implements IResourceManagerReloadListener {
         }
 
         vao.unbind();
+        GLStateManager.enableCull();
         GLStateManager.glDepthMask(true);
         GLStateManager.glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
         GLStateManager.disableBlend();
     }
 
-    private void rebuildGeometry(int anchorX, int anchorZ, int renderRadius, float cloudInteriorHeight, boolean emitTopFace, boolean emitBottomFace, boolean cameraInsideCloud, int marginCells) {
+    private void rebuildGeometry(int anchorX, int anchorZ, int renderRadius, float cloudInteriorHeight, boolean emitTopFace, boolean emitBottomFace, int marginCells) {
         prepareEmitBuffer();
 
         final int marginChunks = (marginCells + CELLS_PER_CHUNK - 1) / CELLS_PER_CHUNK;
-        final int chunkRange = cameraInsideCloud ? 0 : (renderRadius + marginChunks);
-        final int outerLo = cameraInsideCloud ? -1 : -chunkRange;
-        final int outerHi = cameraInsideCloud ? 0 : chunkRange;
+        final int chunkRange = renderRadius + marginChunks;
+        final int outerLo = -chunkRange;
+        final int outerHi = chunkRange;
 
-        final int radiusCellsWithMargin = cameraInsideCloud ? CELLS_PER_CHUNK : (chunkRange * CELLS_PER_CHUNK);
+        final int radiusCellsWithMargin = chunkRange * CELLS_PER_CHUNK;
         final int radiusCellsSq = radiusCellsWithMargin * radiusCellsWithMargin;
 
         final float scrollX = anchorX * SCROLL_SPEED;
         final float scrollZ = anchorZ * SCROLL_SPEED;
 
+        if (cloudMode != 2) {
+            emitFastLayer(chunkRange * CELLS_PER_CHUNK, scrollX, scrollZ);
+            finishGeometry();
+            return;
+        }
+
         final int rows = (outerHi - outerLo + 1) * CELLS_PER_CHUNK;
         final int lpr = (rows + 63) >>> 6;
         final int minX = outerLo * CELLS_PER_CHUNK;
@@ -455,7 +499,7 @@ public class CloudRenderer implements IResourceManagerReloadListener {
 
         for (int chunkX = outerLo; chunkX <= outerHi; chunkX++) {
             for (int chunkZ = outerLo; chunkZ <= outerHi; chunkZ++) {
-                emitChunk(chunkX, chunkZ, anchorX, anchorZ, radiusCellsSq, cameraInsideCloud, emitTopFace, emitBottomFace, y1, ye, scrollX, scrollZ);
+                emitChunk(chunkX, chunkZ, anchorX, anchorZ, radiusCellsSq, emitTopFace, emitBottomFace, y1, ye, scrollX, scrollZ);
             }
         }
 
@@ -463,6 +507,53 @@ public class CloudRenderer implements IResourceManagerReloadListener {
             emitTopBottomGlobalGreedy(emitTopFace, emitBottomFace, ye, scrollX, scrollZ);
         }
 
+        if (emitTopFace && emitBottomFace) {
+            emitInteriorFaces(anchorX, anchorZ, y1, scrollX, scrollZ);
+        }
+
+        finishGeometry();
+    }
+
+    private void emitInteriorFaces(int anchorX, int anchorZ, double y1, float scrollX, float scrollZ) {
+        for (int dz = -1; dz <= 1; dz++) {
+            for (int dx = -1; dx <= 1; dx++) {
+                if (!edges.cellOpaque(anchorX + dx, anchorZ + dz)) continue;
+                final double x0 = dx + INTERIOR_INSET;
+                final double x1 = dx + 1 - INTERIOR_INSET;
+                final double z0 = dz + INTERIOR_INSET;
+                final double z1 = dz + 1 - INTERIOR_INSET;
+                final double yb = INTERIOR_INSET;
+                final double yt = y1 - INTERIOR_INSET;
+                final float uL = dx * SCROLL_SPEED + scrollX;
+                final float uR = (dx + 1) * SCROLL_SPEED + scrollX;
+                final float uC = (dx + 0.5F) * SCROLL_SPEED + scrollX;
+                final float vN = dz * SCROLL_SPEED + scrollZ;
+                final float vS = (dz + 1) * SCROLL_SPEED + scrollZ;
+                final float vC = (dz + 0.5F) * SCROLL_SPEED + scrollZ;
+
+                ensureEmitCapacity(6 * QUAD_BYTES);
+                emitCloudQuad(x0, yb, z1, uL, vS, x1, yb, z1, uR, vS, x1, yb, z0, uR, vN, x0, yb, z0, uL, vN, F_TOP, N_POS_Y);
+                emitCloudQuad(x0, yt, z0, uL, vN, x1, yt, z0, uR, vN, x1, yt, z1, uR, vS, x0, yt, z1, uL, vS, F_BOTTOM, N_NEG_Y);
+                emitCloudQuad(x0, yb, z0, uC, vN, x0, yt, z0, uC, vN, x0, yt, z1, uC, vS, x0, yb, z1, uC, vS, F_X, N_POS_X);
+                emitCloudQuad(x1, yb, z1, uC, vS, x1, yt, z1, uC, vS, x1, yt, z0, uC, vN, x1, yb, z0, uC, vN, F_X, N_NEG_X);
+                emitCloudQuad(x0, yb, z0, uL, vC, x1, yb, z0, uR, vC, x1, yt, z0, uR, vC, x0, yt, z0, uL, vC, F_Z, N_POS_Z);
+                emitCloudQuad(x0, yt, z1, uL, vC, x1, yt, z1, uR, vC, x1, yb, z1, uR, vC, x0, yb, z1, uL, vC, F_Z, N_NEG_Z);
+            }
+        }
+    }
+
+    private void emitFastLayer(int radiusCells, float scrollX, float scrollZ) {
+        final double r0 = -radiusCells;
+        final double r1 = radiusCells;
+        final float u0 = -radiusCells * SCROLL_SPEED + scrollX;
+        final float u1 = radiusCells * SCROLL_SPEED + scrollX;
+        final float v0 = -radiusCells * SCROLL_SPEED + scrollZ;
+        final float v1 = radiusCells * SCROLL_SPEED + scrollZ;
+        ensureEmitCapacity(QUAD_BYTES);
+        emitCloudQuad(r0, 0.0, r0, u0, v0, r1, 0.0, r0, u1, v0, r1, 0.0, r1, u1, v1, r0, 0.0, r1, u0, v1, F_BOTTOM, N_POS_Y);
+    }
+
+    private void finishGeometry() {
         final int totalBytes = (int) (writeAddr - emitBufferAddr);
         final int vertexCount = totalBytes / VERTEX_STRIDE;
         if (vertexCount == 0) {
@@ -523,7 +614,7 @@ public class CloudRenderer implements IResourceManagerReloadListener {
         }
     }
 
-    private void emitChunk(int chunkX, int chunkZ, int anchorX, int anchorZ, int radiusCellsSq, boolean cameraInsideCloud, boolean emitTopFace, boolean emitBottomFace, double y1, double ye, float scrollX, float scrollZ) {
+    private void emitChunk(int chunkX, int chunkZ, int anchorX, int anchorZ, int radiusCellsSq, boolean emitTopFace, boolean emitBottomFace, double y1, double ye, float scrollX, float scrollZ) {
         final float chunkOffsetX = chunkX * (float) CELLS_PER_CHUNK;
         final float chunkOffsetZ = chunkZ * (float) CELLS_PER_CHUNK;
         final int baseU = chunkX * CELLS_PER_CHUNK + anchorX;
@@ -543,43 +634,11 @@ public class CloudRenderer implements IResourceManagerReloadListener {
                 final int relX = chunkX * CELLS_PER_CHUNK + k;
                 final int relZ = chunkZ * CELLS_PER_CHUNK + j;
                 if (relX * relX + relZ * relZ > radiusCellsSq) continue;
-                if (cameraInsideCloud && (Math.abs(relX) > 1 || Math.abs(relZ) > 1)) continue;
                 emittableBits |= 1L << (j * CELLS_PER_CHUNK + k);
             }
         }
         if (emittableBits == 0L) return;
 
-        if (cameraInsideCloud) {
-            long bits = emittableBits;
-            while (bits != 0L) {
-                final int bit = Long.numberOfTrailingZeros(bits);
-                bits &= bits - 1;
-                final int k = bit & 7;
-                final int j = bit >>> 3;
-                final double x0 = chunkOffsetX + k;
-                final double x1 = chunkOffsetX + k + 1;
-                final double z0 = chunkOffsetZ + j;
-                final double z1 = chunkOffsetZ + j + 1;
-                final double xe = x1 - EDGE_OVERLAP;
-                final double zs = z1 - EDGE_OVERLAP;
-                final float uC = (chunkOffsetX + k + 0.5F) * SCROLL_SPEED + scrollX;
-                final float vC = (chunkOffsetZ + j + 0.5F) * SCROLL_SPEED + scrollZ;
-                final float uL = (chunkOffsetX + k) * SCROLL_SPEED + scrollX;
-                final float uR = (chunkOffsetX + k + 1) * SCROLL_SPEED + scrollX;
-                final float vN = (chunkOffsetZ + j) * SCROLL_SPEED + scrollZ;
-                final float vS = (chunkOffsetZ + j + 1) * SCROLL_SPEED + scrollZ;
-
-                ensureEmitCapacity(6 * QUAD_BYTES);
-                emitCloudQuad(x0, 0.0, z1, uL, vS, x1, 0.0, z1, uR, vS, x1, 0.0, z0, uR, vN, x0, 0.0, z0, uL, vN, F_TOP, N_POS_Y);
-                emitCloudQuad(x0, ye, z0, uL, vN, x1, ye, z0, uR, vN, x1, ye, z1, uR, vS, x0, ye, z1, uL, vS, F_BOTTOM, N_NEG_Y);
-                emitCloudQuad(x0, 0.0, z0, uC, vN, x0, y1, z0, uC, vN, x0, y1, z1, uC, vS, x0, 0.0, z1, uC, vS, F_X, N_POS_X);
-                emitCloudQuad(xe, 0.0, z1, uC, vS, xe, y1, z1, uC, vS, xe, y1, z0, uC, vN, xe, 0.0, z0, uC, vN, F_X, N_NEG_X);
-                emitCloudQuad(x0, 0.0, z0, uL, vC, x1, 0.0, z0, uR, vC, x1, y1, z0, uR, vC, x0, y1, z0, uL, vC, F_Z, N_POS_Z);
-                emitCloudQuad(x0, y1, zs, uL, vC, x1, y1, zs, uR, vC, x1, 0.0, zs, uR, vC, x0, 0.0, zs, uL, vC, F_Z, N_NEG_Z);
-            }
-            return;
-        }
-
         if (emitTopFace || emitBottomFace) {
             final int globalColStart = chunkX * CELLS_PER_CHUNK - gridMinX;
             final int globalRowStart = chunkZ * CELLS_PER_CHUNK - gridMinZ;

src/main/java/com/gtnewhorizons/angelica/render/CloudUniforms.java

@@ -9,6 +9,7 @@ final class CloudUniforms {
     static final float ALPHA = 0.8f;
 
     final GlUniformMatrix4f mvp;
+    final GlUniformMatrix4f mv;
     final GlUniformFloat4v colorMult;
     final GlUniformFloat4v fogParams;
     final GlUniformFloat4v fogColor;
@@ -18,11 +19,12 @@ final class CloudUniforms {
     private int lastFogEnabled = -1;
     private float lastFogR = Float.NaN, lastFogG = Float.NaN, lastFogB = Float.NaN;
     private float lastColorR = Float.NaN, lastColorG = Float.NaN, lastColorB = Float.NaN;
-    private float lastFogParamX = Float.NaN, lastFogParamY = Float.NaN;
+    private float lastFogParamX = Float.NaN, lastFogParamY = Float.NaN, lastFogParamZ = Float.NaN, lastFogParamW = Float.NaN;
     private final float[] uploadBuf = new float[4];
 
     CloudUniforms(ShaderBindingContext ctx) {
         mvp = ctx.bindUniform("u_MVPMatrix", GlUniformMatrix4f::new);
+        mv = ctx.bindUniform("u_MVMatrix", GlUniformMatrix4f::new);
         colorMult = ctx.bindUniform("u_ColorMult", GlUniformFloat4v::new);
         fogParams = ctx.bindUniform("u_FogParams", GlUniformFloat4v::new);
         fogColor = ctx.bindUniform("u_FogColor", GlUniformFloat4v::new);
@@ -51,14 +53,16 @@ final class CloudUniforms {
         }
     }
 
-    void setFogParams(float x, float y) {
-        if (x != lastFogParamX || y != lastFogParamY) {
+    void setFogParams(float x, float y, float z, float w) {
+        if (x != lastFogParamX || y != lastFogParamY || z != lastFogParamZ || w != lastFogParamW) {
             lastFogParamX = x;
             lastFogParamY = y;
+            lastFogParamZ = z;
+            lastFogParamW = w;
             uploadBuf[0] = x;
             uploadBuf[1] = y;
-            uploadBuf[2] = 0f;
-            uploadBuf[3] = 0f;
+            uploadBuf[2] = z;
+            uploadBuf[3] = w;
             fogParams.set(uploadBuf);
         }
     }

src/main/java/com/gtnewhorizons/angelica/rendering/AngelicaRenderQueue.java

@@ -7,8 +7,9 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.LockSupport;
 import java.util.function.BooleanSupplier;
 
+import com.gtnewhorizons.angelica.glsm.GLStateManager;
+
 public class AngelicaRenderQueue {
-    private static final Thread MAIN_THREAD = Thread.currentThread();
     private static final Queue<Runnable> TASKS = new ConcurrentLinkedQueue<>();
 
     // Metrics
@@ -33,11 +34,11 @@ public class AngelicaRenderQueue {
     }
 
     private static final Executor EXECUTOR = (runnable) -> {
-        if(Thread.currentThread() == MAIN_THREAD) {
+        if(GLStateManager.isMainThread()) {
             runnable.run();
         } else {
             TASKS.add(runnable);
-            LockSupport.unpark(MAIN_THREAD);
+            LockSupport.unpark(GLStateManager.getMainThread());
         }
     };
 
@@ -45,6 +46,11 @@ public class AngelicaRenderQueue {
         return EXECUTOR;
     }
 
+    public static void submit(Runnable runnable) {
+        TASKS.add(runnable);
+        LockSupport.unpark(GLStateManager.getMainThread());
+    }
+
     public static int processTasks(int max) {
         int tasksRun = 0;
         while(tasksRun < max) {

src/main/java/com/gtnewhorizons/angelica/rendering/PlayerReflectionCapture.java

@@ -0,0 +1,229 @@
+package com.gtnewhorizons.angelica.rendering;
+
+import com.gtnewhorizon.gtnhlib.client.renderer.vertex.DefaultVertexFormat;
+import com.gtnewhorizon.gtnhlib.client.renderer.vertex.VertexFlags;
+import com.gtnewhorizon.gtnhlib.client.renderer.vertex.VertexFormat;
+import com.gtnewhorizons.angelica.glsm.GLStateManager;
+import com.gtnewhorizons.angelica.glsm.QuadConverter;
+import com.gtnewhorizons.angelica.glsm.states.ColorMask;
+import com.gtnewhorizons.angelica.glsm.texture.TextureInfo;
+import com.gtnewhorizons.angelica.glsm.texture.TextureInfoCache;
+import lombok.Getter;
+import net.coderbot.iris.gl.image.GlImage;
+import net.minecraft.client.model.ModelBiped;
+import net.minecraft.client.renderer.entity.Render;
+import net.minecraft.client.renderer.entity.RenderManager;
+import net.minecraft.client.renderer.entity.RendererLivingEntity;
+import net.minecraft.entity.player.EntityPlayer;
+import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL15;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import static com.gtnewhorizon.gtnhlib.bytebuf.MemoryUtilities.memAddress0;
+import static com.gtnewhorizon.gtnhlib.bytebuf.MemoryUtilities.memAlloc;
+import static com.gtnewhorizon.gtnhlib.bytebuf.MemoryUtilities.memFree;
+
+/**
+ * Skins in 1.7.10 are 64x32 while modern has 64x64 textures. We have to address it here.
+ */
+public final class PlayerReflectionCapture {
+
+    public static final int VERTEX_COUNT = 288;
+    public static final int FLOATS_PER_VERTEX = 5; // x, y, z, u, v
+
+    private static final int RAW_INTS_PER_VERTEX = 8;
+
+    private static final int VERTEX_FLAGS = VertexFlags.convertToFlags(true, false, true, false);
+
+    private static boolean active;
+    private static boolean drawnThisCapture;
+    @Getter
+    private static Object target;
+
+    @Getter
+    private static EntityPlayer targetEntity;
+
+    private static int vbo;
+    private static int vao;
+
+    private static int[] rawData;
+    private static float[] vertexScratch;
+    private static int skin64Tex;
+    private static ByteBuffer skinPixels;
+    private static int lastCapturedSkin;
+    private static int lastUploadedAtlas;
+    private static int skinCopyWidth = 64;
+    private static int skinCopyHeight = 32;
+    private static ByteBuffer repackBuffer;
+    private static long repackAddress;
+    private static int repackCapacity;
+
+    private PlayerReflectionCapture() {}
+
+    public static void begin(EntityPlayer player) {
+        active = false;
+        drawnThisCapture = false;
+        target = null;
+        targetEntity = null;
+        if (player == null) return;
+
+        final Render render = RenderManager.instance.getEntityRenderObject(player);
+        if (render instanceof RendererLivingEntity living && living.mainModel instanceof ModelBiped model) {
+            target = model;
+            targetEntity = player;
+            active = true;
+        }
+    }
+
+    public static void end() {
+        active = false;
+        target = null;
+        targetEntity = null;
+    }
+
+    public static boolean shouldCapture() {
+        return active && !drawnThisCapture;
+    }
+
+    /**
+     * Emit the 288-vertex player batch VBO.
+     */
+    public static void drawPlayerCapture(float[] xyzuv) {
+        if (drawnThisCapture) return;
+        drawnThisCapture = true;
+        if (xyzuv == null || xyzuv.length < VERTEX_COUNT * FLOATS_PER_VERTEX) return;
+
+        // Build the Tessellator layout
+        if (rawData == null) rawData = new int[VERTEX_COUNT * RAW_INTS_PER_VERTEX];
+        final int[] raw = rawData;
+        for (int i = 0; i < VERTEX_COUNT; i++) {
+            final int s = i * FLOATS_PER_VERTEX;
+            final int d = i * RAW_INTS_PER_VERTEX;
+            raw[d]     = Float.floatToRawIntBits(xyzuv[s]);
+            raw[d + 1] = Float.floatToRawIntBits(xyzuv[s + 1]);
+            raw[d + 2] = Float.floatToRawIntBits(xyzuv[s + 2]);
+            raw[d + 3] = Float.floatToRawIntBits(xyzuv[s + 3]);
+            raw[d + 4] = Float.floatToRawIntBits(xyzuv[s + 4]);
+            raw[d + 5] = 0xFFFFFFFF;   // color
+            raw[d + 6] = 0x00008000;   // normal
+            raw[d + 7] = 0x00F000F0;   // light
+        }
+
+        // Pack into our own native buffer using the player model's vertex format
+        final VertexFormat format = DefaultVertexFormat.ALL_FORMATS[VERTEX_FLAGS];
+        ensureRepackCapacity(VERTEX_COUNT * format.getVertexSize());
+
+        final long writePtr = format.writeToBuffer0(repackAddress, raw, VERTEX_COUNT * RAW_INTS_PER_VERTEX);
+        repackBuffer.position(0);
+        repackBuffer.limit((int) (writePtr - repackAddress));
+
+        // Upload to our dedicated VBO at offset 0
+        ensureVAO(format);
+        GLStateManager.glBindVertexArray(vao);
+        GLStateManager.glBindBuffer(GL15.GL_ARRAY_BUFFER, vbo);
+        GLStateManager.glBufferData(GL15.GL_ARRAY_BUFFER, repackBuffer, GL15.GL_STREAM_DRAW);
+        GLStateManager.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
+
+        // Bind a 64x64 copy of the skin as `tex`
+        final int activeSkin = GLStateManager.getBoundTextureForServerState();
+        final boolean haveSkin = activeSkin != 0 && activeSkin != skin64Tex;
+        if (haveSkin) {
+            ensureSkin64Texture();
+
+            final GlImage atlas = GlImage.BY_NAME.get("playerAtlas_img");
+            final int atlasId = atlas != null ? atlas.getId() : 0;
+            final boolean skinChanged = activeSkin != lastCapturedSkin;
+
+            if (skinChanged) {
+                final TextureInfo info = TextureInfoCache.INSTANCE.getInfo(activeSkin);
+                final int srcW = info.getWidth();
+                final int srcH = info.getHeight();
+                if (srcW > 0 && srcH > 0) {
+                    final int required = srcW * srcH * 4;
+                    if (skinPixels == null || skinPixels.capacity() < required) {
+                        skinPixels = ByteBuffer.allocateDirect(required).order(ByteOrder.nativeOrder());
+                    }
+                    // The 1.7.10 model UVs only address the top 64x32 region.
+                    skinCopyWidth = Math.min(64, srcW);
+                    skinCopyHeight = Math.min(32, srcH);
+
+                    skinPixels.clear();
+                    GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, activeSkin);
+                    GLStateManager.glGetTexImage(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, skinPixels);
+                    lastCapturedSkin = activeSkin;
+                }
+            }
+
+            if (skinPixels != null && (skinChanged || atlasId != lastUploadedAtlas)) {
+                skinPixels.rewind();
+                GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, skin64Tex);
+                GLStateManager.glTexSubImage2D(GL11.GL_TEXTURE_2D, 0, 0, 0, skinCopyWidth, skinCopyHeight, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, skinPixels);
+
+                if (atlas != null) {
+                    skinPixels.rewind();
+                    GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, atlasId);
+                    GLStateManager.glTexSubImage2D(GL11.GL_TEXTURE_2D, 0, 0, 0, skinCopyWidth, skinCopyHeight, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, skinPixels);
+                }
+                lastUploadedAtlas = atlasId;
+            }
+
+            GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, skin64Tex);
+        }
+
+        final ColorMask prevColor = GLStateManager.getColorMask();
+        final boolean pr = prevColor.red, pg = prevColor.green, pb = prevColor.blue, pa = prevColor.alpha;
+        final boolean prevDepthWrite = GLStateManager.getDepthState().isEnabled();
+
+        GLStateManager.glColorMask(false, false, false, false);
+        GLStateManager.glDepthMask(false);
+        QuadConverter.drawQuadsAsTriangles(0, VERTEX_COUNT);
+        GLStateManager.glDepthMask(prevDepthWrite);
+        GLStateManager.glColorMask(pr, pg, pb, pa);
+
+        if (haveSkin) {
+            GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, activeSkin);
+        }
+
+        GLStateManager.glBindVertexArray(0);
+    }
+
+    public static float[] vertexScratch() {
+        if (vertexScratch == null) vertexScratch = new float[VERTEX_COUNT * FLOATS_PER_VERTEX];
+        return vertexScratch;
+    }
+
+    private static void ensureVAO(VertexFormat format) {
+        if (vao != 0) return;
+        vbo = GLStateManager.glGenBuffers();
+        vao = GLStateManager.glGenVertexArrays();
+        GLStateManager.glBindVertexArray(vao);
+        GLStateManager.glBindBuffer(GL15.GL_ARRAY_BUFFER, vbo);
+        format.setupBufferState(0L);
+        GLStateManager.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
+        GLStateManager.glBindVertexArray(0);
+    }
+
+    private static void ensureSkin64Texture() {
+        if (skin64Tex != 0) return;
+        final int prev = GLStateManager.getBoundTextureForServerState();
+        skin64Tex = GLStateManager.glGenTextures();
+        GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, skin64Tex);
+        final ByteBuffer zero = ByteBuffer.allocateDirect(64 * 64 * 4);
+        GLStateManager.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA8, 64, 64, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, zero);
+        GLStateManager.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST);
+        GLStateManager.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
+        GLStateManager.glBindTexture(GL11.GL_TEXTURE_2D, prev);
+    }
+
+    private static void ensureRepackCapacity(int requiredBytes) {
+        if (repackBuffer != null && requiredBytes <= repackCapacity) return;
+        int newCapacity = Math.max(0x4000, repackCapacity);
+        while (newCapacity < requiredBytes) newCapacity *= 2;
+        if (repackBuffer != null) memFree(repackBuffer);
+        repackBuffer = memAlloc(newCapacity);
+        repackAddress = memAddress0(repackBuffer);
+        repackCapacity = newCapacity;
+    }
+}

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/AngelicaChunkTracker.java

@@ -22,15 +22,14 @@
 
 package com.gtnewhorizons.angelica.rendering.celeritas;
 
-import com.gtnewhorizons.angelica.config.AngelicaConfig;
-import com.gtnewhorizons.angelica.mixins.interfaces.ChunkTrackerAccessor;
-import it.unimi.dsi.fastutil.longs.LongCollection;
-import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
-import it.unimi.dsi.fastutil.longs.LongSets;
+import org.embeddedt.embeddium.impl.render.chunk.RenderSectionManager;
 import org.embeddedt.embeddium.impl.render.chunk.map.ChunkStatus;
-import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTracker;
+import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTrackerImpl;
 import org.embeddedt.embeddium.impl.util.PositionUtil;
 
+import com.gtnewhorizons.angelica.config.AngelicaConfig;
+import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
+
 /**
  * Configurable chunk tracker supporting "fast" and "aggressive" loading modes.
  * Based on Beddium's SafeChunkTracker by Ven and FalsePattern.
@@ -41,109 +40,23 @@ import org.embeddedt.embeddium.impl.util.PositionUtil;
  *
  * Mode can be switched at runtime via options menu - triggers renderer reload.
  */
-public class AngelicaChunkTracker extends ChunkTracker {
-    private final LongOpenHashSet chunkReadyForced = new LongOpenHashSet();
+public class AngelicaChunkTracker extends ChunkTrackerImpl {
 
-    private ChunkTrackerAccessor self() {
-        return (ChunkTrackerAccessor) this;
+    @Override
+    public void forEachReady(RenderSectionManager sectionManager) {
+        if (this.isFastModeEnabled() != AngelicaConfig.useVanillaChunkTracking) {
+            setFastMode(AngelicaConfig.useVanillaChunkTracking);
+        }
+
+        super.forEachReady(sectionManager);
     }
 
     @Override
-    public void onChunkStatusAdded(int x, int z, int flags) {
-        final var key = PositionUtil.packChunk(x, z);
-        final var prev = self().angelica$getChunkStatus().get(key);
-        final var cur = prev | flags;
-
-        if (prev == cur) {
-            return;
+    public void forEachEvent(RenderSectionManager sectionManager) {
+        if (this.isFastModeEnabled() != AngelicaConfig.useVanillaChunkTracking) {
+            setFastMode(AngelicaConfig.useVanillaChunkTracking);
         }
 
-        self().angelica$getChunkStatus().put(key, cur);
-        this.updateNeighbors(x, z);
-    }
-
-    @Override
-    public void onChunkStatusRemoved(int x, int z, int flags) {
-        final var key = PositionUtil.packChunk(x, z);
-        final var prev = self().angelica$getChunkStatus().get(key);
-        final int cur = prev & ~flags;
-
-        if (prev == cur) {
-            return;
-        }
-
-        if (cur == self().angelica$getChunkStatus().defaultReturnValue()) {
-            self().angelica$getChunkStatus().remove(key);
-        } else {
-            self().angelica$getChunkStatus().put(key, cur);
-        }
-
-        this.updateNeighbors(x, z);
-    }
-
-    private void updateNeighbors(int x, int z) {
-        for (int ox = -1; ox <= 1; ox++) {
-            for (int oz = -1; oz <= 1; oz++) {
-                this.updateMerged(ox + x, oz + z);
-            }
-        }
-    }
-
-    private void updateMerged(int x, int z) {
-        final long key = PositionUtil.packChunk(x, z);
-        final int selfFlags = self().angelica$getChunkStatus().get(key);
-
-        // If self doesn't have FLAG_ALL, can't be ready at all
-        if (selfFlags != ChunkStatus.FLAG_ALL) {
-            // Remove from ready if present
-            final boolean wasReady = self().angelica$getChunkReady().remove(key) | this.chunkReadyForced.remove(key);
-            if (wasReady && !self().angelica$getLoadQueue().remove(key)) {
-                self().angelica$getUnloadQueue().add(key);
-            }
-            return;
-        }
-
-        // Check if all neighbors also have FLAG_ALL
-        int mergedFlags = selfFlags;
-        for (int ox = -1; ox <= 1; ox++) {
-            for (int oz = -1; oz <= 1; oz++) {
-                mergedFlags &= self().angelica$getChunkStatus().get(PositionUtil.packChunk(ox + x, oz + z));
-            }
-        }
-
-        if (mergedFlags == ChunkStatus.FLAG_ALL) {
-            // All neighbors ready - add to both sets -- Trigger load if newly added to chunkReadyForced (first time ready)
-            if ((this.chunkReadyForced.add(key) || self().angelica$getChunkReady().add(key)) && !self().angelica$getUnloadQueue().remove(key)) {
-                self().angelica$getLoadQueue().add(key);
-            }
-        } else {
-            // Self ready but neighbors not - add to forced, remove from proper
-            // Trigger load if state changed (moved from proper to forced, or newly forced)
-            if ((this.chunkReadyForced.add(key) || self().angelica$getChunkReady().remove(key)) && !self().angelica$getUnloadQueue().remove(key)) {
-                self().angelica$getLoadQueue().add(key);
-            }
-        }
-    }
-
-    @Override
-    public LongCollection getReadyChunks() {
-        if (AngelicaConfig.useVanillaChunkTracking) {
-            // Aggressive mode: return both ready sets
-            final LongOpenHashSet combined = new LongOpenHashSet(self().angelica$getChunkReady());
-            combined.addAll(this.chunkReadyForced);
-            return LongSets.unmodifiable(combined);
-        } else {
-            // Default mode: only return chunks with all neighbors ready
-            return LongSets.unmodifiable(self().angelica$getChunkReady());
-        }
-    }
-
-    @Override
-    public void forEachEvent(ChunkEventHandler loadEventHandler, ChunkEventHandler unloadEventHandler) {
-        ChunkTracker.forEachChunk(self().angelica$getUnloadQueue(), unloadEventHandler);
-        self().angelica$getUnloadQueue().clear();
-
-        ChunkTracker.forEachChunk(self().angelica$getLoadQueue(), loadEventHandler);
-        self().angelica$getLoadQueue().clear();
+        super.forEachEvent(sectionManager);
     }
 }

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/AngelicaRenderSectionManager.java

@@ -1,5 +1,8 @@
 package com.gtnewhorizons.angelica.rendering.celeritas;
 
+import com.cardinalstar.cubicchunks.world.ICubicWorld;
+import com.gtnewhorizons.angelica.compat.ModStatus;
+import com.gtnewhorizons.angelica.compat.cubicchunks.CubicChunksAPI;
 import com.gtnewhorizons.angelica.mixins.interfaces.RenderSectionManagerAccessor;
 import com.gtnewhorizons.angelica.proxy.ClientProxy;
 import com.gtnewhorizons.angelica.rendering.AngelicaRenderQueue;
@@ -53,7 +56,18 @@ public class AngelicaRenderSectionManager extends RenderSectionManager {
 
     public static AngelicaRenderSectionManager create(ChunkVertexType vertexType, WorldClient world, int renderDistance, CommandList commandList) {
         final ChunkTaskProvider provider = ChunkTaskRegistry.getActiveProvider();
-        return new AngelicaRenderSectionManager(AngelicaRenderPassConfiguration.build(vertexType), world, renderDistance, commandList, 0, 16, provider.threadCount(), provider);
+        final int minSection;
+        final int maxSection;
+
+        if (ModStatus.isCubicChunksLoaded && world instanceof ICubicWorld) {
+            minSection = CubicChunksAPI.getMinSectionY(world);
+            maxSection = CubicChunksAPI.getMaxSectionYExclusive(world);
+        } else {
+            minSection = 0;
+            maxSection = 16;
+        }
+
+        return new AngelicaRenderSectionManager(AngelicaRenderPassConfiguration.build(vertexType), world, renderDistance, commandList, minSection, maxSection, provider.threadCount(), provider);
     }
 
     public void setCameraPosition(double x, double y, double z) {
@@ -125,6 +139,12 @@ public class AngelicaRenderSectionManager extends RenderSectionManager {
         if (chunk.isEmpty()) {
             return true;
         }
+
+        if (ModStatus.isCubicChunksLoaded) {
+            final var section = CubicChunksAPI.getCubeStorage(this.world, x, y, z);
+            return section == null || section.isEmpty();
+        }
+
         final var array = chunk.getBlockStorageArray();
         if (y < 0 || y >= array.length) {
             return true;
@@ -198,6 +218,12 @@ public class AngelicaRenderSectionManager extends RenderSectionManager {
         return IrisShaderProviderHolder.isShadowPass();
     }
 
+    public void markShadowGraphDirty() {
+        if (this.shadowRenderListManager != null) {
+            this.shadowRenderListManager.setNeedsUpdate(true);
+        }
+    }
+
     @Override
     public Collection<String> getDebugStrings() {
         List<String> list = new ArrayList<>(super.getDebugStrings());

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/CeleritasWorldRenderer.java

@@ -1,15 +1,10 @@
 package com.gtnewhorizons.angelica.rendering.celeritas;
 
-import com.gtnewhorizons.angelica.dynamiclights.DynamicLights;
-import com.gtnewhorizons.angelica.dynamiclights.IDynamicLightWorldRenderer;
-import com.gtnewhorizons.angelica.glsm.GLStateManager;
-import com.gtnewhorizons.angelica.mixins.interfaces.ITileEntityBoundingBoxCache;
-import com.gtnewhorizons.angelica.proxy.ClientProxy;
-import com.gtnewhorizons.angelica.rendering.RenderingState;
-import com.gtnewhorizons.angelica.rendering.TileEntityRenderBoundsRegistry;
-import com.gtnewhorizons.angelica.rendering.celeritas.api.IrisShaderProvider;
-import com.gtnewhorizons.angelica.rendering.celeritas.api.IrisShaderProviderHolder;
-import net.coderbot.iris.pipeline.ShadowRenderer;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.Iterator;
+import java.util.List;
+
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.multiplayer.WorldClient;
 import net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher;
@@ -17,6 +12,7 @@ import net.minecraft.entity.Entity;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.AxisAlignedBB;
 import net.minecraftforge.client.MinecraftForgeClient;
+
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.embeddedt.embeddium.impl.gl.device.CommandList;
@@ -32,10 +28,18 @@ import org.embeddedt.embeddium.impl.render.viewport.Viewport;
 import org.joml.Matrix4f;
 import org.lwjgl.opengl.GL11;
 
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.Iterator;
-import java.util.List;
+import com.gtnewhorizons.angelica.compat.ModStatus;
+import com.gtnewhorizons.angelica.compat.cubicchunks.CubicChunksAPI;
+import com.gtnewhorizons.angelica.dynamiclights.DynamicLights;
+import com.gtnewhorizons.angelica.dynamiclights.IDynamicLightWorldRenderer;
+import com.gtnewhorizons.angelica.glsm.GLStateManager;
+import com.gtnewhorizons.angelica.mixins.interfaces.ITileEntityBoundingBoxCache;
+import com.gtnewhorizons.angelica.proxy.ClientProxy;
+import com.gtnewhorizons.angelica.rendering.RenderingState;
+import com.gtnewhorizons.angelica.rendering.TileEntityRenderBoundsRegistry;
+import com.gtnewhorizons.angelica.rendering.celeritas.api.IrisShaderProvider;
+import com.gtnewhorizons.angelica.rendering.celeritas.api.IrisShaderProviderHolder;
+import net.coderbot.iris.pipeline.ShadowRenderer;
 
 public class CeleritasWorldRenderer extends SimpleWorldRenderer<WorldClient, AngelicaRenderSectionManager, BlockRenderLayer, TileEntity, CeleritasWorldRenderer.TileEntityRenderContext> implements IDynamicLightWorldRenderer {
     private static final Logger LOGGER = LogManager.getLogger("Angelica");
@@ -110,12 +114,20 @@ public class CeleritasWorldRenderer extends SimpleWorldRenderer<WorldClient, Ang
 
     @Override
     public int getMinimumBuildHeight() {
-        return 0;
+        if (ModStatus.isCubicChunksLoaded) {
+            return CubicChunksAPI.getMinHeight(this.world);
+        } else {
+            return 0;
+        }
     }
 
     @Override
     public int getMaximumBuildHeight() {
-        return 256;
+        if (ModStatus.isCubicChunksLoaded) {
+            return CubicChunksAPI.getMaxHeight(this.world);
+        } else {
+            return 256;
+        }
     }
 
     @Override

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/CubeStatusEvents.java

@@ -0,0 +1,42 @@
+package com.gtnewhorizons.angelica.rendering.celeritas;
+
+import net.minecraft.client.Minecraft;
+import net.minecraftforge.common.MinecraftForge;
+
+import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTracker;
+import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTrackerHolder;
+
+import com.cardinalstar.cubicchunks.api.event.CubeEvent;
+import com.cardinalstar.cubicchunks.util.CubePos;
+import cpw.mods.fml.common.eventhandler.SubscribeEvent;
+
+public class CubeStatusEvents {
+
+    public static void init() {
+        MinecraftForge.EVENT_BUS.register(new CubeStatusEvents());
+    }
+
+    private ChunkTracker getTracker() {
+        return ChunkTrackerHolder.get(Minecraft.getMinecraft().theWorld);
+    }
+
+    @SubscribeEvent
+    public void onCubeLoaded(CubeEvent.Load event) {
+        if (!event.world.isRemote) return;
+
+        if (getTracker() instanceof CubeStatusTracker cubic) {
+            CubePos pos = event.pos;
+            cubic.onCubeLoaded(pos.getX(), pos.getY(), pos.getZ());
+        }
+    }
+
+    @SubscribeEvent
+    public void onCubeUnloaded(CubeEvent.Unload event) {
+        if (!event.world.isRemote) return;
+
+        if (getTracker() instanceof CubeStatusTracker cubic) {
+            CubePos pos = event.pos;
+            cubic.onCubeUnloaded(pos.getX(), pos.getY(), pos.getZ());
+        }
+    }
+}

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/CubeStatusTracker.java

@@ -0,0 +1,157 @@
+package com.gtnewhorizons.angelica.rendering.celeritas;
+
+import org.embeddedt.embeddium.impl.render.chunk.RenderSectionManager;
+import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTracker;
+
+import com.cardinalstar.cubicchunks.util.HashMap3D;
+import com.cardinalstar.cubicchunks.util.HashSet3D;
+import com.gtnewhorizons.angelica.config.AngelicaConfig;
+
+public class CubeStatusTracker implements ChunkTracker {
+
+    /// Cubes that have been synced to the client and are currently loaded.
+    private final HashSet3D loadedCubes = new HashSet3D();
+    /// Cubes that have their neighbours loaded (as needed) and are ready to be rendered.
+    private final HashSet3D validCubes = new HashSet3D();
+
+    private final HashMap3D<PendingState> changedCubes = new HashMap3D<>();
+
+    private enum PendingState {
+        Add,
+        Remove
+    }
+
+    /// When true, adjacent cubes will not be checked.
+    private boolean fastMode = false;
+
+    public CubeStatusTracker() {
+
+    }
+
+    @Override
+    public void setFastMode(boolean fastMode) {
+        this.fastMode = fastMode;
+
+        this.loadedCubes.forEach(this::pollCube);
+    }
+
+    @Override
+    public boolean isFastModeEnabled() {
+        return fastMode;
+    }
+
+    public void onCubeLoaded(int cubeX, int cubeY, int cubeZ) {
+        if (loadedCubes.add(cubeX, cubeY, cubeZ)) {
+            onCubeChanged(cubeX, cubeY, cubeZ);
+        }
+    }
+
+    public void onCubeUnloaded(int cubeX, int cubeY, int cubeZ) {
+        if (loadedCubes.remove(cubeX, cubeY, cubeZ)) {
+            onCubeChanged(cubeX, cubeY, cubeZ);
+        }
+    }
+
+    private void onCubeChanged(int cubeX, int cubeY, int cubeZ) {
+        pollCube(cubeX, cubeY, cubeZ);
+
+        if (!fastMode) {
+            for (int dz = -1; dz <= 1; dz++) {
+                for (int dy = -1; dy <= 1; dy++) {
+                    for (int dx = -1; dx <= 1; dx++) {
+                        if (dx == 0 && dy == 0 && dz == 0) continue;
+
+                        pollCube(cubeX + dx, cubeY + dy, cubeZ + dz);
+                    }
+                }
+            }
+        }
+    }
+
+    private void pollCube(int cubeX, int cubeY, int cubeZ) {
+        boolean renderable = canRender(cubeX, cubeY, cubeZ);
+        boolean isRendering = validCubes.contains(cubeX, cubeY, cubeZ);
+
+        if (renderable != isRendering) {
+            changedCubes.put(cubeX, cubeY, cubeZ, renderable ? PendingState.Add : PendingState.Remove);
+        } else {
+            changedCubes.remove(cubeX, cubeY, cubeZ);
+        }
+    }
+
+    private boolean canRender(int cubeX, int cubeY, int cubeZ) {
+        if (!loadedCubes.contains(cubeX, cubeY, cubeZ)) return false;
+
+        if (!fastMode) {
+            for (int dz = -1; dz <= 1; dz++) {
+                for (int dy = -1; dy <= 1; dy++) {
+                    for (int dx = -1; dx <= 1; dx++) {
+                        if (dx == 0 && dy == 0 && dz == 0) continue;
+
+                        if (!loadedCubes.contains(cubeX + dx, cubeY + dy, cubeZ + dz)) return false;
+                    }
+                }
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public void onChunkStatusAdded(int i, int i1, int i2) {
+        // do nothing
+    }
+
+    @Override
+    public void onChunkStatusRemoved(int i, int i1, int i2) {
+        // do nothing
+    }
+
+    @Override
+    public void forEachReady(RenderSectionManager renderSectionManager) {
+        if (this.isFastModeEnabled() != AngelicaConfig.useVanillaChunkTracking) {
+            setFastMode(AngelicaConfig.useVanillaChunkTracking);
+        }
+
+        changedCubes.forEach((x, y, z, state) -> {
+            boolean ready = state == PendingState.Add;
+
+            if (ready) {
+                validCubes.add(x, y, z);
+            } else {
+                validCubes.remove(x, y, z);
+            }
+        });
+
+        changedCubes.clear();
+
+        for (var pos : validCubes.fastEntryIterable()) {
+            int x = pos.getX();
+            int y = pos.getY();
+            int z = pos.getZ();
+
+            renderSectionManager.onSectionAdded(x, y, z);
+        }
+    }
+
+    @Override
+    public void forEachEvent(RenderSectionManager renderSectionManager) {
+        if (this.isFastModeEnabled() != AngelicaConfig.useVanillaChunkTracking) {
+            setFastMode(AngelicaConfig.useVanillaChunkTracking);
+        }
+
+        changedCubes.forEach((x, y, z, state) -> {
+            boolean ready = state == PendingState.Add;
+
+            if (ready) {
+                validCubes.add(x, y, z);
+                renderSectionManager.onSectionAdded(x, y, z);
+            } else {
+                validCubes.remove(x, y, z);
+                renderSectionManager.onSectionRemoved(x, y, z);
+            }
+        });
+
+        changedCubes.clear();
+    }
+}

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/world/WorldSlice.java

@@ -1,26 +1,12 @@
 package com.gtnewhorizons.angelica.rendering.celeritas.world;
 
-import com.gtnewhorizons.angelica.api.SectionLightData;
-import com.gtnewhorizons.angelica.api.IBlockAccessExtended;
-import com.gtnewhorizons.angelica.compat.ModStatus;
-import com.gtnewhorizons.angelica.compat.mojang.ChunkSectionPos;
-import com.gtnewhorizons.angelica.compat.mojang.CompatMathHelper;
-import com.gtnewhorizons.angelica.dynamiclights.DynamicLights;
-import com.gtnewhorizons.angelica.dynamiclights.IDynamicLightSource;
-import com.gtnewhorizons.angelica.rendering.celeritas.SmoothBiomeColorCache;
-
+import java.util.Arrays;
 import java.util.List;
-import com.gtnewhorizons.angelica.rendering.celeritas.world.cloned.ChunkRenderContext;
-import com.gtnewhorizons.angelica.rendering.celeritas.world.cloned.ClonedChunkSection;
-import com.gtnewhorizons.angelica.rendering.celeritas.world.cloned.ClonedChunkSectionCache;
-import org.embeddedt.embeddium.impl.util.position.SectionPos;
-import cpw.mods.fml.common.Optional;
-import mega.fluidlogged.api.FLBlockAccess;
+
 import net.minecraft.block.Block;
 import net.minecraft.client.multiplayer.WorldClient;
 import net.minecraft.init.Blocks;
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.MathHelper;
 import net.minecraft.world.EnumSkyBlock;
 import net.minecraft.world.World;
 import net.minecraft.world.biome.BiomeGenBase;
@@ -30,9 +16,24 @@ import net.minecraft.world.chunk.storage.ExtendedBlockStorage;
 import net.minecraft.world.gen.structure.StructureBoundingBox;
 import net.minecraftforge.common.util.ForgeDirection;
 import net.minecraftforge.fluids.Fluid;
+
+import org.embeddedt.embeddium.impl.util.position.SectionPos;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.Arrays;
+import com.gtnewhorizons.angelica.api.IBlockAccessExtended;
+import com.gtnewhorizons.angelica.api.SectionLightData;
+import com.gtnewhorizons.angelica.compat.ModStatus;
+import com.gtnewhorizons.angelica.compat.cubicchunks.CubicChunksAPI;
+import com.gtnewhorizons.angelica.compat.mojang.ChunkSectionPos;
+import com.gtnewhorizons.angelica.compat.mojang.CompatMathHelper;
+import com.gtnewhorizons.angelica.dynamiclights.DynamicLights;
+import com.gtnewhorizons.angelica.dynamiclights.IDynamicLightSource;
+import com.gtnewhorizons.angelica.rendering.celeritas.SmoothBiomeColorCache;
+import com.gtnewhorizons.angelica.rendering.celeritas.world.cloned.ChunkRenderContext;
+import com.gtnewhorizons.angelica.rendering.celeritas.world.cloned.ClonedChunkSection;
+import com.gtnewhorizons.angelica.rendering.celeritas.world.cloned.ClonedChunkSectionCache;
+import cpw.mods.fml.common.Optional;
+import mega.fluidlogged.api.FLBlockAccess;
 
 /**
  * Takes a slice of world state (block states, biome and light data arrays) and copies the data for use in off-thread
@@ -111,7 +112,13 @@ public class WorldSlice implements IBlockAccessExtended, FLBlockAccess {
 
     public static ChunkRenderContext prepare(World world, ChunkSectionPos origin, ClonedChunkSectionCache sectionCache) {
         final Chunk chunk = world.getChunkFromChunkCoords(origin.x, origin.z);
-        final ExtendedBlockStorage section = chunk.getBlockStorageArray()[origin.y];
+        final ExtendedBlockStorage section;
+
+        if (ModStatus.isCubicChunksLoaded) {
+            section = CubicChunksAPI.getCubeStorage(world, origin.x, origin.y, origin.z);
+        } else {
+            section = chunk.getBlockStorageArray()[origin.y];
+        }
 
         // If the chunk section is absent or empty, terminate early
         if (section == null || section.isEmpty()) {
@@ -241,7 +248,10 @@ public class WorldSlice implements IBlockAccessExtended, FLBlockAccess {
 
     @Override
     public int getLightBrightnessForSkyBlocks(int x, int y, int z, int min) {
-        if (y < 0 || y >= 256 || x < -30_000_000 || z < -30_000_000 || x >= 30_000_000 || z >= 30_000_000) {
+        final int minHeight = ModStatus.isCubicChunksLoaded ? CubicChunksAPI.getMinHeight(this.world) : 0;
+        final int maxHeight = ModStatus.isCubicChunksLoaded ? CubicChunksAPI.getMaxHeight(this.world) : 256;
+
+        if (y < minHeight || y >= maxHeight || x < -30_000_000 || z < -30_000_000 || x >= 30_000_000 || z >= 30_000_000) {
             // skyBrightness = 15, blockBrightness = min
             return (15 << 20) | (min << 4);
         }
@@ -372,7 +382,7 @@ public class WorldSlice implements IBlockAccessExtended, FLBlockAccess {
         if (!blockBoxContains(this.volume, x, y, z)) {
             return 0;
         }
-        y = MathHelper.clamp_int(y, 0, 255);
+        y = CompatMathHelper.clampHeight(y);
 
         final int relX = x - this.baseX;
         final int relY = y - this.baseY;

src/main/java/com/gtnewhorizons/angelica/rendering/celeritas/world/cloned/ClonedChunkSection.java

@@ -4,12 +4,11 @@ import com.gtnewhorizons.angelica.api.BlockLightProvider;
 import com.gtnewhorizons.angelica.api.SectionLightData;
 import com.gtnewhorizons.angelica.compat.ExtendedBlockStorageExt;
 import com.gtnewhorizons.angelica.compat.ModStatus;
+import com.gtnewhorizons.angelica.compat.lotr.LOTRCompat;
+import com.gtnewhorizons.angelica.compat.cubicchunks.CubicChunksAPI;
 import com.gtnewhorizons.angelica.compat.mojang.ChunkSectionPos;
 import com.gtnewhorizons.angelica.mixins.interfaces.IChunkTileEntityMapHolder;
 import com.gtnewhorizons.angelica.utils.ConcurrentTileEntityMap;
-import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
-import it.unimi.dsi.fastutil.objects.Object2ObjectMaps;
-import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import it.unimi.dsi.fastutil.shorts.Short2ObjectOpenHashMap;
 import mega.fluidlogged.internal.mixin.hook.FLSubChunk;
 
@@ -25,9 +24,13 @@ import net.minecraft.world.chunk.NibbleArray;
 import net.minecraft.world.chunk.storage.ExtendedBlockStorage;
 import net.minecraftforge.fluids.Fluid;
 
+import java.util.Map;
+
 public class ClonedChunkSection {
 
     private static final ExtendedBlockStorage EMPTY_SECTION = new ExtendedBlockStorage(0, false);
+    private static final int SECTION_BLOCK_LENGTH = 16;
+    private static final int BIOME_DATA_LENGTH = SECTION_BLOCK_LENGTH * SECTION_BLOCK_LENGTH;
 
     private final ClonedChunkSectionCache backingCache;
     private final World world;
@@ -53,7 +56,13 @@ public class ClonedChunkSection {
             throw new RuntimeException("Couldn't retrieve chunk at " + pos.toChunkPos());
         }
 
-        ExtendedBlockStorage section = getChunkSection(chunk, pos);
+        ExtendedBlockStorage section;
+
+        if (ModStatus.isCubicChunksLoaded) {
+            section = CubicChunksAPI.getCubeStorage(world, pos.x, pos.y, pos.z);
+        } else {
+            section = getChunkSection(chunk, pos);
+        }
 
         if (section == null) {
             section = EMPTY_SECTION;
@@ -62,7 +71,7 @@ public class ClonedChunkSection {
         this.pos = pos;
         this.data = new ExtendedBlockStorageExt(chunk, section);
 
-        this.biomeData = new BiomeGenBase[16 * 16];
+        this.biomeData = new BiomeGenBase[BIOME_DATA_LENGTH];
 
         copyBlockEntities(chunk, pos);
 
@@ -72,15 +81,22 @@ public class ClonedChunkSection {
     }
 
     private void fillBiomeData(Chunk chunk) {
-        final WorldChunkManager wcm = world.getWorldChunkManager();
-        for (int lz = 0; lz < 16; lz++) {
-            for (int lx = 0; lx < 16; lx++) {
-                this.biomeData[lx | (lz << 4)] = chunk.getBiomeGenForWorldCoords(lx, lz, wcm);
+        if (LOTRCompat.isLotrProvider(world.provider)) {
+            for (int z = pos.getMinZ(); z <= pos.getMaxZ(); z++) {
+                for (int x = pos.getMinX(); x <= pos.getMaxX(); x++) {
+                    this.biomeData[((z & 15) << 4) | (x & 15)] = world.getBiomeGenForCoords(x, z);
+                }
+            }
+        } else {
+            final WorldChunkManager wcm = world.getWorldChunkManager();
+            for (int lz = 0; lz < SECTION_BLOCK_LENGTH; lz++) {
+                for (int lx = 0; lx < SECTION_BLOCK_LENGTH; lx++) {
+                    this.biomeData[(lz << 4) | lx] = chunk.getBiomeGenForWorldCoords(lx, lz, wcm);
+                }
             }
         }
     }
 
-    @SuppressWarnings("unchecked")
     private void copyBlockEntities(Chunk chunk, ChunkSectionPos pos) {
         this.tileEntities.clear();
 
@@ -88,22 +104,13 @@ public class ClonedChunkSection {
 
         map.readLock();
         try {
-            final Object2ObjectOpenHashMap<ChunkPosition, TileEntity> delegate = map.getDelegate();
-
-            if (!delegate.isEmpty()) {
-                final int minY = pos.getMinY();
-                final int maxY = pos.getMaxY();
-
-                for (Object2ObjectMap.Entry<ChunkPosition, TileEntity> entry : Object2ObjectMaps.fastIterable(delegate)) {
-                    final ChunkPosition tePos = entry.getKey();
-                    if (tePos.chunkPosY < minY || tePos.chunkPosY > maxY) continue;
-
-                    final TileEntity te = entry.getValue();
-                    if (te != null && !te.isInvalid()) {
-                        this.tileEntities.put(ChunkSectionPos.packLocal(tePos.chunkPosX & 15, tePos.chunkPosY & 15, tePos.chunkPosZ & 15), te);
-                    }
-                }
-            }
+            map.forEachInYRange(pos.getMinY(), pos.getMaxY(), entry -> {
+                final ChunkPosition tePos = entry.getKey();
+                this.tileEntities.put(
+                    ChunkSectionPos.packLocal(tePos.chunkPosX & 15, tePos.chunkPosY & 15, tePos.chunkPosZ & 15),
+                    entry.getValue()
+                );
+            });
         } finally {
             map.readUnlock();
         }
@@ -169,12 +176,15 @@ public class ClonedChunkSection {
         this.lastUsedTimestamp = timestamp;
     }
 
-    public static boolean isOutOfBuildLimitVertically(int y) {
+    public static boolean isOutOfBuildLimitVertically(World world, int y) {
+        if (ModStatus.isCubicChunksLoaded) {
+            return y < CubicChunksAPI.getMinHeight(world) || y >= CubicChunksAPI.getMaxHeight(world);
+        }
         return y < 0 || y >= 256;
     }
 
-    private static ExtendedBlockStorage getChunkSection(Chunk chunk, ChunkSectionPos pos) {
-        if (!isOutOfBuildLimitVertically(ChunkSectionPos.getBlockCoord(pos.y))) {
+    private ExtendedBlockStorage getChunkSection(Chunk chunk, ChunkSectionPos pos) {
+        if (!isOutOfBuildLimitVertically(this.world, ChunkSectionPos.getBlockCoord(pos.y))) {
             return chunk.getBlockStorageArray()[pos.y];
         }
         return null;

src/main/java/com/gtnewhorizons/angelica/utils/ConcurrentTileEntityMap.java

@@ -1,6 +1,7 @@
 package com.gtnewhorizons.angelica.utils;
 
 import com.gtnewhorizons.angelica.rendering.RenderThreadContext;
+import it.unimi.dsi.fastutil.objects.Object2ObjectMaps;
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.world.ChunkPosition;
@@ -10,15 +11,30 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.function.Consumer;
 
 /**
- * Thread-safe wrapper around Object2ObjectOpenHashMap for chunkTileEntityMap.
+ * Thread-safe wrapper around a tile entity map for chunkTileEntityMap.
+ * May wrap either a plain Object2ObjectOpenHashMap (vanilla) or a ColumnTileEntityMap (cubic chunks).
  */
 public class ConcurrentTileEntityMap implements Map<ChunkPosition, TileEntity> {
-    private final Object2ObjectOpenHashMap<ChunkPosition, TileEntity> delegate = new Object2ObjectOpenHashMap<>();
+    private final Object2ObjectOpenHashMap<ChunkPosition, TileEntity> flatDelegate;
+    private final Map<ChunkPosition, TileEntity> delegate;
     private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
     private final ConcurrentLinkedQueue<ChunkPosition> invalidationQueue = new ConcurrentLinkedQueue<>();
 
+    /** Vanilla path: backs the map with a fresh flat map. */
+    public ConcurrentTileEntityMap() {
+        this.flatDelegate = new Object2ObjectOpenHashMap<>();
+        this.delegate = this.flatDelegate;
+    }
+
+    /** cubic chunks path: wraps an existing map (e.g. ColumnTileEntityMap). */
+    public ConcurrentTileEntityMap(Map<ChunkPosition, TileEntity> toWrap) {
+        this.flatDelegate = null;
+        this.delegate = toWrap;
+    }
+
     public void queueInvalidation(ChunkPosition pos) {
         invalidationQueue.add(pos);
     }
@@ -59,14 +75,27 @@ public class ConcurrentTileEntityMap implements Map<ChunkPosition, TileEntity> {
         }
     }
 
-    public Object2ObjectOpenHashMap<ChunkPosition, TileEntity> getDelegate() {
-        return delegate;
-    }
-
     public TileEntity putDirect(ChunkPosition key, TileEntity value) {
         return delegate.put(key, value);
     }
 
+    /**
+     * Iterates all non-invalid tile entities whose Y coordinate falls within [minY, maxY].
+     * Caller must hold the read lock.
+     */
+    public void forEachInYRange(int minY, int maxY, Consumer<Map.Entry<ChunkPosition, TileEntity>> action) {
+        final Iterable<? extends Map.Entry<ChunkPosition, TileEntity>> entries =
+            flatDelegate != null ? Object2ObjectMaps.fastIterable(flatDelegate) : delegate.entrySet();
+        for (Map.Entry<ChunkPosition, TileEntity> entry : entries) {
+            final ChunkPosition tePos = entry.getKey();
+            if (tePos.chunkPosY < minY || tePos.chunkPosY > maxY) continue;
+            final TileEntity te = entry.getValue();
+            if (te != null && !te.isInvalid()) {
+                action.accept(entry);
+            }
+        }
+    }
+
     private static boolean isRenderWorkerThread() {
         return RenderThreadContext.hasWorldSlice();
     }
@@ -135,7 +164,10 @@ public class ConcurrentTileEntityMap implements Map<ChunkPosition, TileEntity> {
         lock.writeLock().lock();
         try {
             invalidationQueue.clear();
-            delegate.clear();
+            if (flatDelegate != null) {
+                flatDelegate.clear();
+            }
+            // wrapped delegate manages its own TE lifetime; skip clear()
         } finally {
             lock.writeLock().unlock();
         }

src/main/java/com/prupe/mcpatcher/ctm/BlockOrientation.java

@@ -6,6 +6,7 @@ import net.minecraft.util.IIcon;
 import net.minecraft.world.IBlockAccess;
 
 import com.prupe.mcpatcher.mal.block.BlockStateMatcher;
+import net.minecraftforge.common.util.ForgeDirection;
 
 final class BlockOrientation extends RenderBlockState {
 
@@ -39,12 +40,13 @@ final class BlockOrientation extends RenderBlockState {
     private int altMetadata;
     private int metadataBits;
     private int renderType;
+    private boolean iCtmBlock;
 
     private int blockFace;
     private int textureFace;
     private int textureFaceOrig;
     private int rotateUV;
-    private boolean flipBottom;
+    private boolean flipped;
 
     @Override
     public void clear() {
@@ -57,7 +59,7 @@ final class BlockOrientation extends RenderBlockState {
         offsetsComputed = false;
         haveOffsets = false;
         dx = dy = dz = 0;
-        flipBottom = !fixedBottomFaceUV;
+        flipped = false;
     }
 
     @Override
@@ -75,6 +77,11 @@ final class BlockOrientation extends RenderBlockState {
         return z;
     }
 
+    @Override
+    public int getMetadata() {
+        return metadata;
+    }
+
     @Override
     public int getBlockFace() {
         return blockFace;
@@ -102,7 +109,10 @@ final class BlockOrientation extends RenderBlockState {
 
     @Override
     public int[] getOffset(int blockFace, int relativeDirection) {
-        return NEIGHBOR_OFFSET[flipBottom && blockFace == 0 ? 1 : blockFace][rotateUV(relativeDirection)];
+        if(flipped){
+            blockFace = ForgeDirection.OPPOSITES[blockFace];
+        }
+        return NEIGHBOR_OFFSET[blockFace][rotateUV(relativeDirection)];
     }
 
     @Override
@@ -146,14 +156,14 @@ final class BlockOrientation extends RenderBlockState {
     }
 
 
-    public void setFlipBottom(){
-        flipBottom = true;
+    public void flipFace() {
+        flipped = true;
     }
 
     @Override
     public boolean shouldConnectByBlock(Block neighbor, int neighborX, int neighborY, int neighborZ) {
-        return block == neighbor
-            && (metadataBits & (1 << blockAccess.getBlockMetadata(neighborX, neighborY, neighborZ))) != 0;
+        return iCtmBlock ? ((ICTMBlock) block).shouldConnectByBlock(this, neighbor, neighborX, neighborY, neighborZ)
+            : block == neighbor && (metadataBits & (1 << blockAccess.getBlockMetadata(neighborX, neighborY, neighborZ))) != 0;
     }
 
     @Override
@@ -171,11 +181,12 @@ final class BlockOrientation extends RenderBlockState {
         copy.altMetadata = altMetadata;
         copy.metadataBits = metadataBits;
         copy.renderType = renderType;
+        copy.iCtmBlock = iCtmBlock;
         copy.blockFace = blockFace;
         copy.textureFace = textureFace;
         copy.textureFaceOrig = textureFaceOrig;
         copy.rotateUV = rotateUV;
-        copy.flipBottom = flipBottom;
+        copy.flipped = flipped;
 
         copy.blockAccess = blockAccess;
         copy.block = block;
@@ -199,6 +210,7 @@ final class BlockOrientation extends RenderBlockState {
         this.z = z;
         renderType = block.getRenderType();
         metadata = altMetadata = blockAccess.getBlockMetadata(x, y, z);
+        iCtmBlock = block instanceof ICTMBlock;
         offsetsComputed = false;
     }
 
@@ -208,7 +220,7 @@ final class BlockOrientation extends RenderBlockState {
         rotateUV = 0;
         textureFace = blockFaceToTextureFace(blockFace);
         metadataBits = (1 << metadata) | (1 << altMetadata);
-        flipBottom = !fixedBottomFaceUV;
+        flipped = !fixedBottomFaceUV && blockFace == ForgeDirection.DOWN.ordinal();
     }
 
     void setBlockMetadata(Block block, int metadata, int face) {
@@ -219,6 +231,7 @@ final class BlockOrientation extends RenderBlockState {
         renderType = block.getRenderType();
         blockFace = textureFace = textureFaceOrig = face;
         this.metadata = metadata;
+        iCtmBlock = block instanceof ICTMBlock;
         metadataBits = 1 << metadata;
         dx = dy = dz = 0;
         rotateUV = 0;

src/main/java/com/prupe/mcpatcher/ctm/CTMUtils.java

@@ -9,6 +9,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.StampedLock;
+import java.util.function.Consumer;
 
 import com.github.bsideup.jabel.Desugar;
 import net.minecraft.block.Block;
@@ -34,10 +35,22 @@ public class CTMUtils {
 
     public static final MCLogger logger = MCLogger.getLogger(MCLogger.Category.CONNECTED_TEXTURES, "CTM");
 
-    private static class Overrides {
+    public static class Overrides {
         private final List<TileOverride> all = new ArrayList<>();
         private final Map<Block, List<BlockStateMatcher>> block = new IdentityHashMap<>();
         private final Map<String, List<TileOverride>> tile = new HashMap<>();
+
+        public List<TileOverride> getAll() {
+            return all;
+        }
+
+        public Map<Block, List<BlockStateMatcher>> getBlock() {
+            return block;
+        }
+
+        public Map<String, List<TileOverride>> getTile() {
+            return tile;
+        }
     }
 
     private static Overrides overrides = new Overrides();
@@ -82,6 +95,8 @@ public class CTMUtils {
 
     private static final AtomicInteger texturePackChangeCounter = new AtomicInteger(0);
 
+    private static final ArrayList<Consumer<Overrides>> ctmRegistrationCallbacks = new ArrayList<>();
+
     static {
         try {
             Class.forName(MCPatcherUtils.RENDER_PASS_CLASS)
@@ -117,6 +132,9 @@ public class CTMUtils {
                             .listResources(TexturePackAPI.MCPATCHER_SUBDIR + "ctm", ".properties", true)) {
                             registerOverrideWithoutLock(newOverrides, TileOverride.create(resource, tileLoader));
                         }
+                        for (Consumer<Overrides> callback : ctmRegistrationCallbacks) {
+                            callback.accept(newOverrides);
+                        }
                     }
                     for (ResourceLocation resource : BlendMethod.getAllBlankResources()) {
                         tileLoader.preloadTile(resource, false);
@@ -257,7 +275,7 @@ public class CTMUtils {
         return RenderPassAPI.instance.skipDefaultRendering(block);
     }
 
-    private static void registerOverrideWithoutLock(Overrides overrides, TileOverride override) {
+    public static void registerOverrideWithoutLock(Overrides overrides, TileOverride override) {
         if (override != null && !override.isDisabled()) {
             boolean registered = false;
             List<BlockStateMatcher> matchingBlocks = override.getMatchingBlocks();
@@ -308,4 +326,8 @@ public class CTMUtils {
     private static TileOverrideIterator.Metadata newMetadataIterator() {
         return new TileOverrideIterator.Metadata(overrides.block, overrides.tile);
     }
+
+    public static void addCtmRegistrationCallback(Consumer<Overrides> consumer) {
+        ctmRegistrationCallbacks.add(consumer);
+    }
 }

src/main/java/com/prupe/mcpatcher/ctm/CompactCtmQuadProcessor.java

@@ -4,6 +4,7 @@ import it.unimi.dsi.fastutil.ints.Int2IntMap;
 import net.minecraft.block.Block;
 import net.minecraft.client.renderer.RenderBlocks;
 import net.minecraft.util.IIcon;
+import net.minecraftforge.common.util.ForgeDirection;
 
 public final class CompactCtmQuadProcessor {
 
@@ -52,29 +53,33 @@ public final class CompactCtmQuadProcessor {
         this.override = compact;
     }
 
-    public boolean processFace(RenderBlocks rb, RenderBlockState renderBlockState, IIcon origIcon) {
-        if(renderBlockState instanceof BlockOrientation blockOrientation){
-            blockOrientation.setFlipBottom();
+    public boolean processFace(RenderBlocks rb, RenderBlockState renderBlockState, IIcon origIcon, int face) {
+        boolean shouldFlip = face == ForgeDirection.DOWN.ordinal();
+        if(ForgeDirection.OPPOSITES[face] == renderBlockState.getBlockFace()){
+            shouldFlip = !shouldFlip;
+        }
+        if(shouldFlip && renderBlockState instanceof BlockOrientation blockOrientation){
+            blockOrientation.flipFace();
         }
         int neighborBits = override.getNeighborBits(renderBlockState, origIcon);
 
         int ctmIndex = TileOverride.neighborMap[neighborBits & 0xFF];
         IIcon replacement = getReplacementIcon(ctmIndex);
         if (replacement != null) {
-            renderWholeFace(rb, renderBlockState, replacement);
+            renderWholeFace(rb, renderBlockState, replacement, face);
             return true;
         }
 
         if (neighborBits == 0 || neighborBits == 0xFF) {
             IIcon sprite = sprites[getCompactSpriteIndex(neighborBits)];
             if (sprite != null) {
-                renderWholeFace(rb, renderBlockState, sprite);
+                renderWholeFace(rb, renderBlockState, sprite, face);
                 return true;
             }
             return false;
         }
 
-        renderSplitFace(rb, renderBlockState, neighborBits);
+        renderSplitFace(rb, renderBlockState, neighborBits, face);
         return true;
     }
 
@@ -117,8 +122,7 @@ public final class CompactCtmQuadProcessor {
         return SPRITE_DEFAULT;
     }
 
-    private void renderSplitFace(RenderBlocks rb, RenderBlockState renderBlockState, int connections) {
-        final int face = renderBlockState.getBlockFace();
+    private void renderSplitFace(RenderBlocks rb, RenderBlockState renderBlockState, int connections, int face) {
 
         final double minX = rb.renderMinX, minY = rb.renderMinY, minZ = rb.renderMinZ;
         final double maxX = rb.renderMaxX, maxY = rb.renderMaxY, maxZ = rb.renderMaxZ;
@@ -155,7 +159,7 @@ public final class CompactCtmQuadProcessor {
             }
             setQuadrantBounds(rb, face, q, minX, minY, minZ, maxX, maxY, maxZ);
             rb.overrideBlockTexture = icon;
-            renderFace(rb, renderBlockState, icon);
+            renderFace(rb, renderBlockState, icon, face);
         }
 
         if (ao) {
@@ -219,18 +223,17 @@ public final class CompactCtmQuadProcessor {
         return (sky << 16) | (block & 0xFFFF);
     }
 
-    private void renderWholeFace(RenderBlocks rb, RenderBlockState renderBlockState, IIcon icon) {
+    private void renderWholeFace(RenderBlocks rb, RenderBlockState renderBlockState, IIcon icon, int face) {
         IIcon saved = rb.overrideBlockTexture;
         rb.overrideBlockTexture = icon;
         try {
-            renderFace(rb, renderBlockState, icon);
+            renderFace(rb, renderBlockState, icon, face);
         } finally {
             rb.overrideBlockTexture = saved;
         }
     }
 
-    private void renderFace(RenderBlocks rb, RenderBlockState renderBlockState, IIcon icon) {
-        int face = renderBlockState.getBlockFace();
+    private void renderFace(RenderBlocks rb, RenderBlockState renderBlockState, IIcon icon, int face) {
         Block block = renderBlockState.getBlock();
         int x = renderBlockState.getX();
         int y = renderBlockState.getY();

src/main/java/com/prupe/mcpatcher/ctm/ICTMBlock.java

@@ -0,0 +1,10 @@
+package com.prupe.mcpatcher.ctm;
+
+import net.minecraft.block.Block;
+
+/**
+ * Implement this interface on blocks that support connected textures to allow them to control if they connect to neighbors or not
+ */
+public interface ICTMBlock {
+    boolean shouldConnectByBlock(RenderBlockState renderBlockState, Block neighbor, int neighborX, int neighborY, int neighborZ);
+}

src/main/java/com/prupe/mcpatcher/ctm/RenderBlockState.java

@@ -109,6 +109,8 @@ abstract public class RenderBlockState {
 
     abstract public int getZ();
 
+    abstract public int getMetadata();
+
     abstract public int getBlockFace();
 
     abstract public int getTextureFace();

src/main/java/com/prupe/mcpatcher/ctm/TileOverride.java

@@ -33,7 +33,7 @@ public abstract class TileOverride implements Comparable<TileOverride> {
 
     private static final MCLogger logger = MCLogger.getLogger(MCLogger.Category.CONNECTED_TEXTURES, "CTM");
 
-    protected final PropertiesFile properties;
+    public final PropertiesFile properties;
     private final String baseFilename;
     protected final TileLoader tileLoader;
     protected final int renderPass;
@@ -79,7 +79,10 @@ public abstract class TileOverride implements Comparable<TileOverride> {
         if (properties == null) {
             return null;
         }
+        return create(properties, tileLoader);
+    }
 
+    public static TileOverride create(PropertiesFile properties, TileLoader tileLoader) {
         String method = properties.getString("method", "default")
             .toLowerCase();
         TileOverride override = null;
@@ -211,7 +214,7 @@ public abstract class TileOverride implements Comparable<TileOverride> {
             for (int i = 0;; i++) {
                 ResourceLocation resource = TileLoader
                     .parseTileAddress(properties.getResource(), String.valueOf(i), blankResource);
-                if (!TexturePackAPI.hasResource(resource)) {
+                if (!TexturePackAPI.hasResource(resource) && !tileLoader.ignoreMissingTextures()) {
                     break;
                 }
                 if (!addIcon(resource)) {
@@ -237,7 +240,7 @@ public abstract class TileOverride implements Comparable<TileOverride> {
                         .parseTileAddress(properties.getResource(), token, blankResource);
                     if (resource == null) {
                         tileNames.add(null);
-                    } else if (TexturePackAPI.hasResource(resource)) {
+                    } else if (TexturePackAPI.hasResource(resource) || tileLoader.ignoreMissingTextures()) {
                         addIcon(resource);
                     } else {
                         properties.warning("could not find image %s", resource);
@@ -252,7 +255,7 @@ public abstract class TileOverride implements Comparable<TileOverride> {
         for (int i = from; i <= to; i++) {
             ResourceLocation resource = TileLoader
                 .parseTileAddress(properties.getResource(), String.valueOf(i), blankResource);
-            if (TexturePackAPI.hasResource(resource)) {
+            if (TexturePackAPI.hasResource(resource) || tileLoader.ignoreMissingTextures()) {
                 addIcon(resource);
             } else {
                 properties.warning("could not find image %s", resource);

src/main/java/com/prupe/mcpatcher/mal/resource/PropertiesFile.java

@@ -9,12 +9,12 @@ import net.minecraft.util.ResourceLocation;
 import com.prupe.mcpatcher.MCLogger;
 import com.prupe.mcpatcher.MCPatcherUtils;
 
-final public class PropertiesFile {
+public class PropertiesFile {
 
-    private final MCLogger logger;
-    private final ResourceLocation resource;
-    private final String prefix;
-    private final Properties properties;
+    protected final MCLogger logger;
+    protected final ResourceLocation resource;
+    protected final String prefix;
+    protected final Properties properties;
     private int errorCount;
 
     public static PropertiesFile get(MCLogger logger, ResourceLocation resource) {
@@ -147,4 +147,16 @@ final public class PropertiesFile {
             return resource.equals(((PropertiesFile) that).resource);
         }
     }
+
+    public MCLogger getLogger() {
+        return logger;
+    }
+
+    public String getPrefix() {
+        return prefix;
+    }
+
+    public Properties getProperties() {
+        return properties;
+    }
 }

src/main/java/com/prupe/mcpatcher/mal/tile/TileLoader.java

@@ -275,7 +275,7 @@ public class TileLoader {
         return false;
     }
 
-    private boolean registerOneIcon(TextureMap textureMap, String mapName, Map<String, TextureAtlasSprite> map) {
+    protected boolean registerOneIcon(TextureMap textureMap, String mapName, Map<String, TextureAtlasSprite> map) {
         ResourceLocation resource = tilesToRegister.iterator()
             .next();
         String name = resource.toString();
@@ -304,6 +304,16 @@ public class TileLoader {
                 return false;
             }
         }
+        TextureAtlasSprite icon = registerIconToMap(textureMap, resource, name);
+        map.put(name, icon);
+        iconMap.put(name, icon);
+        String extra = (width == height ? "" : ", " + (height / width) + " frames");
+        subLogger.finer("%s -> %s icon %dx%d%s", name, mapName, width, width, extra);
+        tilesToRegister.remove(resource);
+        return true;
+    }
+
+    protected TextureAtlasSprite registerIconToMap(TextureMap textureMap, ResourceLocation resource, String name) {
         TextureAtlasSprite icon;
         if(generatedTiles.contains(resource)){
             icon = new GeneratedCTMAtlasSprite(this, textureMap.anisotropicFiltering > 1, name);
@@ -311,12 +321,7 @@ public class TileLoader {
         }else{
             icon = (TextureAtlasSprite)textureMap.registerIcon(name);
         }
-        map.put(name, icon);
-        iconMap.put(name, icon);
-        String extra = (width == height ? "" : ", " + (height / width) + " frames");
-        subLogger.finer("%s -> %s icon %dx%d%s", name, mapName, width, width, extra);
-        tilesToRegister.remove(resource);
-        return true;
+        return icon;
     }
 
     public void finish() {
@@ -339,4 +344,8 @@ public class TileLoader {
     public IIcon getIcon(ResourceLocation resource) {
         return resource == null ? null : getIcon(resource.toString());
     }
+
+    public boolean ignoreMissingTextures() {
+        return false;
+    }
 }

src/main/java/jss/notfine/core/Settings.java

@@ -176,7 +176,7 @@ public enum Settings {
     },
     VOID_FOG(new NotFineOptionTickBox(false, OptionImpact.LOW)),
     ZOOM_SMOOTH(new NotFineOptionTickBox(true, OptionImpact.LOW)),
-    ZOOM_SMOOTH_SPEED(new NotFineOptionSlider(14, 1, 30, 1, OptionImpact.LOW));
+    ZOOM_SMOOTH_SPEED(new NotFineOptionSlider(20, 1, 30, 1, OptionImpact.LOW));
 
     public final NotFineOption<?> option;
 

src/main/java/me/jellysquid/mods/sodium/client/gui/SodiumGameOptionPages.java

@@ -1,8 +1,22 @@
 package me.jellysquid.mods.sodium.client.gui;
 
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.resources.I18n;
+import net.minecraft.client.settings.GameSettings;
+
+import org.lwjgl.opengl.Display;
+
+import com.cardinalstar.cubicchunks.api.compat.CubicChunksVideoSettings;
 import com.google.common.collect.ImmutableList;
+import com.gtnewhorizons.angelica.AngelicaMod;
+import com.gtnewhorizons.angelica.compat.ModStatus;
 import com.gtnewhorizons.angelica.config.AngelicaConfig;
 import com.gtnewhorizons.angelica.glsm.GLStateManager;
+import cpw.mods.fml.common.Optional.Method;
 import com.gtnewhorizons.angelica.glsm.streaming.StreamingUploader;
 import jss.notfine.core.Settings;
 import jss.notfine.core.SettingsManager;
@@ -22,19 +36,12 @@ import me.jellysquid.mods.sodium.client.gui.options.named.LightingQuality;
 import me.jellysquid.mods.sodium.client.gui.options.named.MultiDrawMode;
 import me.jellysquid.mods.sodium.client.gui.options.named.ParticleMode;
 import me.jellysquid.mods.sodium.client.gui.options.storage.AngelicaOptionsStorage;
+import me.jellysquid.mods.sodium.client.gui.options.storage.CubicChunksOptionStorage;
 import me.jellysquid.mods.sodium.client.gui.options.storage.MinecraftOptionsStorage;
 import me.jellysquid.mods.sodium.client.gui.options.storage.SodiumOptionsStorage;
 import net.coderbot.iris.Iris;
 import net.coderbot.iris.gui.option.IrisVideoSettings;
-import net.minecraft.client.Minecraft;
-import net.minecraft.client.resources.I18n;
-import net.minecraft.client.settings.GameSettings;
 import org.embeddedt.embeddium.impl.render.chunk.occlusion.AsyncOcclusionMode;
-import org.lwjgl.opengl.Display;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
 
 public class SodiumGameOptionPages {
     private static final SodiumOptionsStorage sodiumOpts = new SodiumOptionsStorage();
@@ -54,7 +61,13 @@ public class SodiumGameOptionPages {
                 .setFlags(OptionFlag.REQUIRES_RENDERER_RELOAD)
                 .build());
 
+       
+        if (ModStatus.isCubicChunksLoaded) {
+            firstGroupBuilder.add(getCCVerticalViewDistance());
+        }
+        
         if(Iris.enabled) {
+
             final OptionImpl<GameSettings, Integer> maxShadowDistanceSlider = OptionImpl.createBuilder(int.class, vanillaOpts)
                 .setName(I18n.format("options.iris.shadowDistance"))
                 .setTooltip(I18n.format("options.iris.shadowDistance.sodium_tooltip"))
@@ -499,6 +512,27 @@ public class SodiumGameOptionPages {
         return new OptionPage(I18n.format("sodium.options.pages.performance"), ImmutableList.copyOf(groups));
     }
 
+    @Method(modid = "cubicchunks")
+    private static OptionImpl<?, ?> getCCVerticalViewDistance() {
+        CubicChunksOptionStorage storage = new CubicChunksOptionStorage();
+
+        return OptionImpl.createBuilder(int.class, storage)
+            .setName(I18n.format("sodium.options.cc.vertical_view_distance.name"))
+            .setTooltip(I18n.format("sodium.options.cc.vertical_view_distance.tooltip"))
+            .setControl(option -> new SliderControl(
+                option,
+                CubicChunksVideoSettings.getMinVerticalViewDistance(),
+                CubicChunksVideoSettings.getMaxVerticalViewDistance(),
+                1,
+                ControlValueFormatter.quantity("options.chunks")))
+            .setBinding(
+                (options, value) -> options.verticalViewDistance = value,
+                options -> options.verticalViewDistance)
+            .setImpact(OptionImpact.HIGH)
+            .setFlags(OptionFlag.REQUIRES_RENDERER_RELOAD)
+            .build();
+    }
+
     public static OptionPage appearance() {
         final List<OptionGroup> groups = new ArrayList<>();
 

src/main/java/me/jellysquid/mods/sodium/client/gui/options/storage/CubicChunksOptionStorage.java

@@ -0,0 +1,22 @@
+package me.jellysquid.mods.sodium.client.gui.options.storage;
+
+import com.cardinalstar.cubicchunks.api.compat.CubicChunksVideoSettings;
+
+public class CubicChunksOptionStorage implements OptionStorage<CubicChunksOptionStorage.CubicChunksOptions> {
+
+    public static class CubicChunksOptions {
+        public int verticalViewDistance = CubicChunksVideoSettings.getVerticalViewDistance();
+    }
+
+    private final CubicChunksOptions options = new CubicChunksOptions();
+
+    @Override
+    public CubicChunksOptions getData() {
+        return options;
+    }
+
+    @Override
+    public void save() {
+        CubicChunksVideoSettings.setVerticalViewDistance(options.verticalViewDistance);
+    }
+}

src/main/java/net/coderbot/iris/features/FeatureFlags.java

@@ -10,7 +10,7 @@ import java.util.function.BooleanSupplier;
 public enum FeatureFlags {
 	SEPARATE_HARDWARE_SAMPLERS(() -> true, () -> true),
 	PER_BUFFER_BLENDING(() -> true, RenderSystem::supportsBufferBlending),
-	COMPUTE_SHADERS(() -> false, RenderSystem::supportsCompute),
+	COMPUTE_SHADERS(() -> true, RenderSystem::supportsCompute),
 	ENTITY_TRANSLUCENT(() -> true, () -> true),
 	BLOCK_EMISSION_ATTRIBUTE(() -> true, () -> true),
 	CUSTOM_IMAGES(() -> true, RenderSystem::supportsImageLoadStore),

src/main/java/net/coderbot/iris/gl/image/GlImage.java

@@ -12,7 +12,12 @@ import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.GL12;
 import org.lwjgl.opengl.GL14;
 
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
 public class GlImage extends GlObject {
+	public static final Map<String, GlImage> BY_NAME = new ConcurrentHashMap<>();
+
 	protected final String name;
 	protected final String samplerName;
 	protected final TextureType target;
@@ -42,6 +47,8 @@ public class GlImage extends GlObject {
 		setup(texture, width, height, depth);
 
 		GLStateManager.glBindTexture(target.getGlType(), 0);
+
+		BY_NAME.put(name, this);
 	}
 
 	protected void setup(int texture, int width, int height, int depth) {
@@ -106,6 +113,7 @@ public class GlImage extends GlObject {
 	@Override
 	protected void destroyInternal() {
 		GLStateManager.glDeleteTextures(handle());
+		BY_NAME.remove(name, this);
 	}
 
 	public InternalTextureFormat getInternalFormat() {

src/main/java/net/coderbot/iris/pipeline/DeferredWorldRenderingPipeline.java

@@ -170,6 +170,7 @@ public class DeferredWorldRenderingPipeline implements WorldRenderingPipeline, R
 	private final CloudSetting cloudSetting;
 	private final boolean shouldRenderUnderwaterOverlay;
 	private final boolean shouldRenderVignette;
+	private final boolean supportsEndFlash;
 	private final boolean shouldRenderSun;
 	private final boolean shouldRenderMoon;
 	private final boolean shouldRenderStars;
@@ -231,6 +232,7 @@ public class DeferredWorldRenderingPipeline implements WorldRenderingPipeline, R
 		this.cloudSetting = programs.getPackDirectives().getCloudSetting();
 		this.shouldRenderUnderwaterOverlay = programs.getPackDirectives().underwaterOverlay();
 		this.shouldRenderVignette = programs.getPackDirectives().vignette();
+		this.supportsEndFlash = programs.getPackDirectives().isSupportsEndFlash();
 		this.shouldRenderSun = programs.getPackDirectives().shouldRenderSun();
 		this.shouldRenderMoon = programs.getPackDirectives().shouldRenderMoon();
 		this.shouldRenderStars = programs.getPackDirectives().shouldRenderStars();
@@ -651,6 +653,11 @@ public class DeferredWorldRenderingPipeline implements WorldRenderingPipeline, R
 		return shouldRenderVignette;
 	}
 
+	@Override
+	public boolean supportsEndFlash() {
+		return supportsEndFlash;
+	}
+
 	@Override
 	public boolean shouldRenderSun() {
 		return shouldRenderSun;

src/main/java/net/coderbot/iris/pipeline/FixedFunctionWorldRenderingPipeline.java

@@ -152,6 +152,11 @@ public class FixedFunctionWorldRenderingPipeline implements WorldRenderingPipeli
 		return false;
 	}
 
+	@Override
+	public boolean supportsEndFlash() {
+		return false;
+	}
+
 	@Override
 	public CloudSetting getCloudSetting() {
 		return CloudSetting.DEFAULT;

src/main/java/net/coderbot/iris/pipeline/ShadowRenderer.java

@@ -7,6 +7,7 @@ import com.gtnewhorizons.angelica.compat.toremove.MatrixStack;
 import com.gtnewhorizons.angelica.config.AngelicaConfig;
 import com.gtnewhorizons.angelica.glsm.GLStateManager;
 import com.gtnewhorizons.angelica.glsm.RenderSystem;
+import com.gtnewhorizons.angelica.rendering.PlayerReflectionCapture;
 import com.gtnewhorizons.angelica.rendering.RenderingState;
 import com.gtnewhorizons.angelica.rendering.celeritas.CeleritasWorldRenderer;
 import net.coderbot.iris.Iris;
@@ -468,11 +469,13 @@ public class ShadowRenderer {
 		profiler.endStartSection("build geometry");
 
 		setupEntityShadowState(modelView, cameraX, cameraY, cameraZ);
+		PlayerReflectionCapture.begin(player);
 		try {
 			for (Entity entity : renderedEntitiesList) {
 				RenderManager.instance.renderEntitySimple(entity, tickDelta);
 			}
 		} finally {
+			PlayerReflectionCapture.end();
 			teardownEntityShadowState();
 		}
 
@@ -516,7 +519,7 @@ public class ShadowRenderer {
 	private void renderPlayerEntity(EntityRenderer levelRenderer, Frustrum frustum, Object bufferSource, MatrixStack modelView, double cameraX, double cameraY, double cameraZ, float tickDelta) {
 		profiler.startSection("cull");
 
-		Entity player = Minecraft.getMinecraft().thePlayer;
+		EntityPlayer player = Minecraft.getMinecraft().thePlayer;
 
 		// Skip if spectating or outside frustum
 		if (GameModeUtil.isSpectator()) {
@@ -547,7 +550,12 @@ public class ShadowRenderer {
 				shadowEntities++;
 			}
 
-			RenderManager.instance.renderEntitySimple(player, tickDelta);
+			PlayerReflectionCapture.begin(player);
+			try {
+				RenderManager.instance.renderEntitySimple(player, tickDelta);
+			} finally {
+				PlayerReflectionCapture.end();
+			}
 			shadowEntities++;
 		} finally {
 			teardownEntityShadowState();
@@ -684,7 +692,7 @@ public class ShadowRenderer {
 		// Mark the shadow graph as needing update before terrain setup
 		// Modern Celeritas does this to ensure the shadow render lists get populated
 		com.gtnewhorizons.angelica.rendering.celeritas.CeleritasWorldRenderer.getInstance()
-			.getRenderSectionManager().markGraphDirty();
+			.getRenderSectionManager().markShadowGraphDirty();
 
 		// Execute the vanilla terrain setup / culling routines using our shadow frustum.
         mc.renderGlobal.clipRenderersByFrustum(terrainFrustumHolder.getFrustum(), playerCamera.getPartialTicks());

src/main/java/net/coderbot/iris/pipeline/WorldRenderingPipeline.java

@@ -49,6 +49,7 @@ public interface WorldRenderingPipeline {
 
 	boolean shouldDisableVanillaEntityShadows();
 	boolean shouldDisableDirectionalShading();
+	boolean supportsEndFlash();
 	CloudSetting getCloudSetting();
 	boolean shouldRenderUnderwaterOverlay();
 	boolean shouldRenderVignette();

src/main/java/net/coderbot/iris/shaderpack/PackDirectives.java

@@ -48,6 +48,7 @@ public class PackDirectives {
 	@Getter private boolean oldHandLight;
 	@Getter private boolean prepareBeforeShadow;
 	@Getter private boolean supportsColorCorrection;
+	@Getter private boolean supportsEndFlash;
 	@Getter private int fallbackTex;
 	private Object2ObjectMap<String, Object2BooleanMap<String>> explicitFlips = new Object2ObjectOpenHashMap<>();
 	private Object2ObjectMap<String, TextureScaleOverride> scaleOverrides = new Object2ObjectOpenHashMap<>();
@@ -93,6 +94,7 @@ public class PackDirectives {
 		oldLighting = properties.getOldLighting().orElse(false);
 		fallbackTex = properties.getFallbackTex();
 		supportsColorCorrection = properties.getSupportsColorCorrection().orElse(false);
+		supportsEndFlash = properties.getSupportsEndFlash().orElse(false);
 		concurrentCompute = properties.getConcurrentCompute().orElse(false);
 		oldHandLight = properties.getOldHandLight().orElse(true);
 		explicitFlips = properties.getExplicitFlips();
@@ -112,6 +114,7 @@ public class PackDirectives {
 		frustumCulling = directives.frustumCulling;
 		occlusionCulling = directives.occlusionCulling;
 		oldLighting = directives.oldLighting;
+		supportsEndFlash = directives.supportsEndFlash;
 		concurrentCompute = directives.concurrentCompute;
 		explicitFlips = directives.explicitFlips;
 		scaleOverrides = directives.scaleOverrides;

src/main/java/net/coderbot/iris/shaderpack/ShaderProperties.java

@@ -70,6 +70,7 @@ public class ShaderProperties {
 	@Getter private OptionalBoolean shadowPlayer = OptionalBoolean.DEFAULT;
 	@Getter private OptionalBoolean shadowBlockEntities = OptionalBoolean.DEFAULT;
 	@Getter private OptionalBoolean shadowLightBlockEntities = OptionalBoolean.DEFAULT;
+	@Getter private OptionalBoolean supportsEndFlash = OptionalBoolean.DEFAULT;
 	@Getter private OptionalBoolean underwaterOverlay = OptionalBoolean.DEFAULT;
 	@Getter private OptionalBoolean sun = OptionalBoolean.DEFAULT;
 	@Getter private OptionalBoolean moon = OptionalBoolean.DEFAULT;
@@ -205,6 +206,7 @@ public class ShaderProperties {
 			handleBooleanDirective(key, value, "shadowPlayer", bool -> shadowPlayer = bool);
 			handleBooleanDirective(key, value, "shadowBlockEntities", bool -> shadowBlockEntities = bool);
 			handleBooleanDirective(key, value, "shadowLightBlockEntities", bool -> shadowLightBlockEntities = bool);
+			handleBooleanDirective(key, value, "endFlashShadows", bool -> supportsEndFlash = bool);
 			handleBooleanDirective(key, value, "underwaterOverlay", bool -> underwaterOverlay = bool);
 			handleBooleanDirective(key, value, "sun", bool -> sun = bool);
 			handleBooleanDirective(key, value, "moon", bool -> moon = bool);

src/main/java/net/coderbot/iris/shadow/ShadowMatrices.java

@@ -1,6 +1,12 @@
 package net.coderbot.iris.shadow;
 
+import com.gtnewhorizons.angelica.compat.etfuturum.EndFlashCompat;
 import com.gtnewhorizons.angelica.compat.toremove.MatrixStack;
+import net.coderbot.iris.Iris;
+import net.coderbot.iris.pipeline.WorldRenderingPipeline;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.multiplayer.WorldClient;
+import net.minecraft.world.WorldProviderEnd;
 import org.joml.Matrix4f;
 
 import static com.gtnewhorizons.angelica.compat.mojang.Constants.DEGREES_TO_RADIANS;
@@ -40,23 +46,41 @@ public class ShadowMatrices {
 	}
 
 	public static void createBaselineModelViewMatrix(MatrixStack target, float shadowAngle, float sunPathRotation) {
-		final float skyAngle;
-
-		if (shadowAngle < 0.25f) {
-			skyAngle = shadowAngle + 0.75f;
-		} else {
-			skyAngle = shadowAngle - 0.25f;
-		}
-
 		target.peek().getNormal().identity();
 		target.peek().getModel().identity();
 
 		target.peek().getModel().translate(0.0f, 0.0f, -100.0f);
-        target.rotateX(90F * DEGREES_TO_RADIANS);
-        target.rotateZ(skyAngle * -360.0f * DEGREES_TO_RADIANS);
-        target.rotateX(sunPathRotation * DEGREES_TO_RADIANS);
+
+		if (isEndFlashShadow()) {
+			// Project shadows from the End flash direction instead of the sun/moon.
+			target.rotateX((0.0f - EndFlashCompat.getXAngle()) * DEGREES_TO_RADIANS);
+			target.rotateY(EndFlashCompat.getYAngle() * DEGREES_TO_RADIANS);
+		} else {
+			final float skyAngle;
+
+			if (shadowAngle < 0.25f) {
+				skyAngle = shadowAngle + 0.75f;
+			} else {
+				skyAngle = shadowAngle - 0.25f;
+			}
+
+			target.rotateX(90F * DEGREES_TO_RADIANS);
+			target.rotateZ(skyAngle * -360.0f * DEGREES_TO_RADIANS);
+			target.rotateX(sunPathRotation * DEGREES_TO_RADIANS);
+		}
     }
 
+	private static boolean isEndFlashShadow() {
+		final Minecraft mc = Minecraft.getMinecraft();
+		if (mc == null) {
+			return false;
+		}
+		final WorldClient world = mc.theWorld;
+		return world != null && world.provider instanceof WorldProviderEnd
+			&& EndFlashCompat.isAvailable()
+			&& Iris.getPipelineManager().getPipeline().map(WorldRenderingPipeline::supportsEndFlash).orElse(false);
+	}
+
 	public static void snapModelViewToGrid(MatrixStack target, float shadowIntervalSize, double cameraX, double cameraY, double cameraZ) {
 		if (Math.abs(shadowIntervalSize) == 0.0F) {
 			// Avoid a division by zero - semantically, this just means that the snapping does not take place,

src/main/java/net/coderbot/iris/uniforms/CelestialUniforms.java

@@ -1,10 +1,14 @@
 package net.coderbot.iris.uniforms;
 
+import com.gtnewhorizons.angelica.compat.etfuturum.EndFlashCompat;
 import com.gtnewhorizons.angelica.compat.mojang.Constants;
 import com.gtnewhorizons.angelica.rendering.RenderingState;
+import net.coderbot.iris.Iris;
 import net.coderbot.iris.gl.uniform.UniformHolder;
+import net.coderbot.iris.pipeline.WorldRenderingPipeline;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.multiplayer.WorldClient;
+import net.minecraft.world.WorldProviderEnd;
 import org.joml.Matrix4f;
 import org.joml.Vector4f;
 
@@ -18,9 +22,12 @@ import static net.coderbot.iris.gl.uniform.UniformUpdateFrequency.PER_FRAME;
 public final class CelestialUniforms {
 	private static final Vector4f upPositionCache = new Vector4f();
 	private static final Matrix4f upMatrixCache = new Matrix4f();
+	private static final Vector4f ZERO_VECTOR_4f = new Vector4f(0.0F, 0.0F, 0.0F, 0.0F);
 
 	private final Vector4f positionCache = new Vector4f();
 	private final Matrix4f celestialMatrixCache = new Matrix4f();
+	private final Vector4f endFlashPositionCache = new Vector4f();
+	private final Matrix4f endFlashMatrixCache = new Matrix4f();
     private final float sunPathRotation;
 
 	public CelestialUniforms(float sunPathRotation) {
@@ -34,9 +41,46 @@ public final class CelestialUniforms {
 			.uniformTruncated3f(PER_FRAME, "moonPosition", this::getMoonPosition)
 			.uniform1f(PER_FRAME, "shadowAngle", CelestialUniforms::getShadowAngle)
 			.uniformTruncated3f(PER_FRAME, "shadowLightPosition", this::getShadowLightPosition)
+			.uniformTruncated3f(PER_FRAME, "endFlashPosition", this::getEndFlashPosition)
 			.uniformTruncated3f(PER_FRAME, "upPosition", CelestialUniforms::getUpPosition);
 	}
 
+	private Vector4f getEndFlashPosition() {
+		final WorldClient world = Minecraft.getMinecraft().theWorld;
+		if (world == null || !(world.provider instanceof WorldProviderEnd) || !EndFlashCompat.isAvailable()) {
+			return ZERO_VECTOR_4f;
+		}
+
+		final float yAngle = EndFlashCompat.getYAngle();
+		final float xAngle = EndFlashCompat.getXAngle();
+
+		endFlashPositionCache.set(0.0F, 100.0F, 0.0F, 0.0F);
+		endFlashMatrixCache.set(RenderingState.INSTANCE.getModelViewMatrix());
+		endFlashMatrixCache.rotateY((180.0F - yAngle) * Constants.DEGREES_TO_RADIANS);
+		endFlashMatrixCache.rotateX((-90.0F - xAngle) * Constants.DEGREES_TO_RADIANS);
+		endFlashMatrixCache.transform(endFlashPositionCache);
+		return endFlashPositionCache;
+	}
+
+	private Vector4f getEndFlashPositionInWorldSpace() {
+		final float yAngle = EndFlashCompat.getYAngle();
+		final float xAngle = EndFlashCompat.getXAngle();
+
+		endFlashPositionCache.set(0.0F, 100.0F, 0.0F, 0.0F);
+		endFlashMatrixCache.identity();
+		endFlashMatrixCache.rotateY((180.0F - yAngle) * Constants.DEGREES_TO_RADIANS);
+		endFlashMatrixCache.rotateX((-90.0F - xAngle) * Constants.DEGREES_TO_RADIANS);
+		endFlashMatrixCache.transform(endFlashPositionCache);
+		return endFlashPositionCache;
+	}
+
+	private static boolean isEndFlashShadowActive() {
+		final WorldClient world = Minecraft.getMinecraft().theWorld;
+		return world != null && world.provider instanceof WorldProviderEnd
+			&& EndFlashCompat.isAvailable()
+			&& Iris.getPipelineManager().getPipeline().map(WorldRenderingPipeline::supportsEndFlash).orElse(false);
+	}
+
 	public static float getSunAngle() {
 		final float skyAngle = getSkyAngle();
 
@@ -66,10 +110,16 @@ public final class CelestialUniforms {
 	}
 
 	public Vector4f getShadowLightPosition() {
+		if (isEndFlashShadowActive()) {
+			return getEndFlashPosition();
+		}
 		return isDay() ? getSunPosition() : getMoonPosition();
 	}
 
 	public Vector4f getShadowLightPositionInWorldSpace() {
+		if (isEndFlashShadowActive()) {
+			return getEndFlashPositionInWorldSpace();
+		}
 		return isDay() ? getCelestialPositionInWorldSpace(100.0F) : getCelestialPositionInWorldSpace(-100.0F);
 	}
 

src/main/java/net/coderbot/iris/uniforms/CommonUniforms.java

@@ -58,7 +58,7 @@ public final class CommonUniforms {
         SystemTimeUniforms.addSystemTimeUniforms(uniforms);
 		BiomeUniforms.addBiomeUniforms(uniforms);
         new CelestialUniforms(directives.getSunPathRotation()).addCelestialUniforms(uniforms);
-        IrisExclusiveUniforms.addIrisExclusiveUniforms(uniforms);
+        IrisExclusiveUniforms.addIrisExclusiveUniforms(uniforms, updateNotifier);
         IdMapUniforms.addIdMapUniforms(updateNotifier, uniforms, idMap, directives.isOldHandLight());
         MatrixUniforms.addMatrixUniforms(uniforms, directives);
 

src/main/java/net/coderbot/iris/uniforms/EndFlashStorage.java

@@ -0,0 +1,19 @@
+package net.coderbot.iris.uniforms;
+
+import com.gtnewhorizons.angelica.compat.etfuturum.EndFlashCompat;
+import lombok.Getter;
+
+/**
+ * Holds the current and previous-frame End flash intensity.
+ */
+@Getter
+public class EndFlashStorage {
+    private float lastEndFlash;
+    private float currentEndFlash;
+
+    public void tick() {
+        lastEndFlash = currentEndFlash;
+        currentEndFlash = EndFlashCompat.getIntensity(CapturedRenderingState.INSTANCE.getTickDelta());
+    }
+
+}

src/main/java/net/coderbot/iris/uniforms/IrisExclusiveUniforms.java

@@ -1,5 +1,6 @@
 package net.coderbot.iris.uniforms;
 
+import com.gtnewhorizons.angelica.compat.etfuturum.EndFlashCompat;
 import com.gtnewhorizons.angelica.compat.etfuturum.EtFuturumCompat;
 import com.gtnewhorizons.angelica.compat.mojang.Camera;
 import com.gtnewhorizons.angelica.compat.mojang.GameModeUtil;
@@ -41,9 +42,15 @@ public class IrisExclusiveUniforms {
 	private static int cachedSelectedFrame = -1;
 	private static int cachedSelectedBlockId;
 
-	public static void addIrisExclusiveUniforms(UniformHolder uniforms) {
+	public static void addIrisExclusiveUniforms(UniformHolder uniforms, FrameUpdateNotifier updateNotifier) {
 		WorldInfoUniforms.addWorldInfoUniforms(uniforms);
 
+		// Et Futurum Requiem backports the End Flash
+		final EndFlashStorage endFlashStorage = new EndFlashStorage();
+		if (EndFlashCompat.isAvailable()) {
+			updateNotifier.addListener(endFlashStorage::tick);
+		}
+
 		//All Iris-exclusive uniforms (uniforms which do not exist in either OptiFine or ShadersMod) should be registered here.
 		uniforms.uniform1f(UniformUpdateFrequency.PER_FRAME, "thunderStrength", IrisExclusiveUniforms::getThunderStrength);
 		uniforms.uniform1f(UniformUpdateFrequency.PER_TICK, "currentPlayerHealth", IrisExclusiveUniforms::getCurrentHealth);
@@ -59,6 +66,8 @@ public class IrisExclusiveUniforms {
 		uniforms.uniform3d(UniformUpdateFrequency.PER_FRAME, "relativeEyePosition", IrisExclusiveUniforms::getRelativeEyePosition);
 		uniforms.uniform4f(UniformUpdateFrequency.PER_TICK, "lightningBoltPosition", IrisExclusiveUniforms::getLightningBoltPosition);
 		uniforms.uniform1f(UniformUpdateFrequency.PER_FRAME, "cloudTime", IrisExclusiveUniforms::getCloudTime);
+		uniforms.uniform1f(UniformUpdateFrequency.PER_TICK, "endFlashIntensity", endFlashStorage::getCurrentEndFlash);
+		uniforms.uniform1f(UniformUpdateFrequency.PER_TICK, "previousEndFlashIntensity", endFlashStorage::getLastEndFlash);
 		uniforms.uniform1b(UniformUpdateFrequency.PER_TICK, "feetInWater", IrisExclusiveUniforms::isFeetInWater);
 		uniforms.uniform1b(UniformUpdateFrequency.PER_TICK, "isRiding", IrisExclusiveUniforms::isRiding);
 		uniforms.uniform1b(UniformUpdateFrequency.PER_TICK, "vehicleInWater", IrisExclusiveUniforms::isVehicleInWater);

src/main/java/net/coderbot/iris/vertices/ExtendedDataHelper.java

@@ -12,9 +12,9 @@ public final class ExtendedDataHelper {
 
 	public static int computeMidBlock(float x, float y, float z, int localPosX, int localPosY, int localPosZ) {
 		return packMidBlock(
-				localPosX + 0.5f - x,
-				localPosY + 0.5f - y,
-				localPosZ + 0.5f - z
+            (localPosX & 0xFFFF) + 0.5f - x,
+			(localPosY & 0xFFFF) + 0.5f - y,
+			(localPosZ & 0xFFFF) + 0.5f - z
 		);
 	}
 }

src/main/resources/assets/angelica/lang/en_US.lang

@@ -17,6 +17,8 @@ sodium.options.pages.appearance=Appearance
 sodium.options.pages.text=Text Effects
 sodium.options.view_distance.tooltip=The render distance controls how far away terrain will be rendered. Shorter distances mean that less terrain will be rendered, improving frame rates.
 sodium.options.simulation_distance.tooltip=The simulation distance controls how far away terrain and entities will be loaded and ticked. Shorter distances can reduce the internal server's load and may improve frame rates.
+sodium.options.cc.vertical_view_distance.name=Vertical View Distance
+sodium.options.cc.vertical_view_distance.tooltip=The vertical view distance controls the vertical range within which cubes will be loaded, centered on the player. Shorter distances mean that less terrain will be rendered, improving frame rates.
 sodium.options.brightness.tooltip=Controls the brightness (gamma) of the game.
 sodium.options.clouds.name=Clouds
 sodium.options.clouds.tooltip=Controls whether or not clouds will be visible.

src/main/resources/assets/angelica/shaders/cloud.frag

@@ -1,12 +1,12 @@
 #version 330 core
 
 in vec2 v_UV;
-in float v_FogCoord;
+in vec3 v_EyePos;
 in float v_Factor;
 
 uniform sampler2D u_Tex;
 uniform vec4 u_ColorMult;
-uniform vec4 u_FogParams; // x: -1/(end-start), y: end/(end-start)
+uniform vec4 u_FogParams; // linear: x=-1/(end-start), y=end/(end-start); exp/exp2: z=density; w=mode (0=linear, 1=exp, 2=exp2)
 uniform vec4 u_FogColor;
 uniform bool u_FogEnabled;
 
@@ -19,8 +19,17 @@ void main() {
     color.rgb *= v_Factor;
 
     if (u_FogEnabled) {
-        float f = clamp(v_FogCoord * u_FogParams.x + u_FogParams.y, 0.0, 1.0);
-        color.rgb = mix(u_FogColor.rgb, color.rgb, f);
+        float fogCoord = length(v_EyePos);
+        float f;
+        if (u_FogParams.w == 0.0) {
+            f = fogCoord * u_FogParams.x + u_FogParams.y;
+        } else if (u_FogParams.w == 1.0) {
+            f = exp(-u_FogParams.z * fogCoord);
+        } else {
+            float d = u_FogParams.z * fogCoord;
+            f = exp(-d * d);
+        }
+        color.rgb = mix(u_FogColor.rgb, color.rgb, clamp(f, 0.0, 1.0));
     }
 
     fragColor = color;

src/main/resources/assets/angelica/shaders/cloud.vert

@@ -5,14 +5,15 @@ layout(location = 2) in vec2 a_UV;
 layout(location = 5) in float a_Factor;
 
 uniform mat4 u_MVPMatrix;
+uniform mat4 u_MVMatrix;
 
 out vec2 v_UV;
-out float v_FogCoord;
+out vec3 v_EyePos;
 out float v_Factor;
 
 void main() {
     gl_Position = u_MVPMatrix * vec4(a_Position, 1.0);
     v_UV = a_UV;
-    v_FogCoord = length(a_Position.xz);
+    v_EyePos = (u_MVMatrix * vec4(a_Position, 1.0)).xyz;
     v_Factor = a_Factor;
 }

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/angelica/MixinForgeHooksClient_CoreProfile.java

@@ -3,6 +3,7 @@ package com.gtnewhorizons.angelica.mixins.early.angelica;
 import com.gtnewhorizon.gtnhlib.config.ConfigurationManager;
 import com.gtnewhorizons.angelica.AngelicaMod;
 import com.gtnewhorizons.angelica.config.AngelicaConfig;
+import com.gtnewhorizons.angelica.glsm.RenderSystem;
 import com.gtnewhorizons.angelica.glsm.GLStateManager;
 import net.minecraftforge.client.ForgeHooksClient;
 import org.apache.logging.log4j.LogManager;
@@ -11,6 +12,7 @@ import org.lwjgl.LWJGLException;
 import org.lwjgl.opengl.ContextAttribs;
 import org.lwjgl.opengl.Display;
 import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL32;
 import org.lwjgl.opengl.PixelFormat;
 import org.lwjgl.LWJGLUtil;
 import org.spongepowered.asm.mixin.Mixin;
@@ -63,15 +65,22 @@ public abstract class MixinForgeHooksClient_CoreProfile {
         final int platformMaxMinor = (LWJGLUtil.getPlatform() == LWJGLUtil.PLATFORM_MACOSX) ? 1 : 6;
         final int platformMax = platformMaxMajor * 10 + platformMaxMinor;
 
+        int maxProbe = platformMax;
+
         // Try pinned version first if configured
         final int pinned = angelica$clampPinned(AngelicaConfig.pinnedGLVersion, platformMax);
         if (pinned >= 33) {
             final Exception e = angelica$tryCreate(attribs, format, setMajor, setMinor, pinned / 10, pinned % 10);
             if (e == null) {
-                LOGGER.info("Created GL {}.{} core profile context (pinned)", pinned / 10, pinned % 10);
-                return;
+                final int cap = angelica$validateContext(pinned / 10, pinned % 10);
+                if (cap == 0) {
+                    LOGGER.info("Created GL {}.{} core profile context (pinned)", pinned / 10, pinned % 10);
+                    return;
+                }
+                maxProbe = Math.min(maxProbe, cap);
+            } else {
+                LOGGER.warn("Pinned GL version {}.{} failed, probing from highest", pinned / 10, pinned % 10);
             }
-            LOGGER.warn("Pinned GL version {}.{} failed, probing from highest", pinned / 10, pinned % 10);
         }
 
         // Probe from highest to lowest
@@ -80,8 +89,14 @@ public abstract class MixinForgeHooksClient_CoreProfile {
             final int maxMinor = (major == 4) ? platformMaxMinor : 3;
             final int minMinor = (major == 3) ? 3 : 0;
             for (int minor = maxMinor; minor >= minMinor; --minor) {
+                if (major * 10 + minor > maxProbe) continue;
                 final Exception e = angelica$tryCreate(attribs, format, setMajor, setMinor, major, minor);
                 if (e == null) {
+                    final int cap = angelica$validateContext(major, minor);
+                    if (cap != 0) {
+                        maxProbe = Math.min(maxProbe, cap);
+                        continue;
+                    }
                     final int version = major * 10 + minor;
                     LOGGER.info("Created GL {}.{} core profile context", major, minor);
                     // Auto-pin if below platform max, or update a stale pin
@@ -127,6 +142,20 @@ public abstract class MixinForgeHooksClient_CoreProfile {
         }
     }
 
+    @Unique
+    private static int angelica$validateContext(int major, int minor) {
+        final String glVersion = GLStateManager.glGetString(GL11.GL_VERSION);
+        final int actual = RenderSystem.parseMajorMinor(glVersion);
+        final boolean core = (GLStateManager.glGetInteger(GL32.GL_CONTEXT_PROFILE_MASK) & GL32.GL_CONTEXT_CORE_PROFILE_BIT) != 0;
+        if (RenderSystem.isContextValid(major, minor, actual, core)) {
+            return 0;
+        }
+        LOGGER.warn("Requested GL {}.{} core context but driver returned \"{}\" (core profile: {}, GPU: {}); falling back to a lower version", major, minor, glVersion, core, GLStateManager.glGetString(GL11.GL_RENDERER));
+        try { Display.destroy(); } catch (Exception ignored) {}
+        final int requested = major * 10 + minor;
+        return (actual >= 0 && actual < requested) ? actual : requested - 1;
+    }
+
     @Unique
     private static void angelica$savePin(int version) {
         AngelicaConfig.pinnedGLVersion = version;

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/angelica/bugfixes/MixinRendererLivingEntity_OverlayTint.java

@@ -13,6 +13,7 @@ import net.minecraft.client.renderer.entity.RendererLivingEntity;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityLivingBase;
 import org.lwjgl.opengl.GL11;
+import org.lwjgl.opengl.GL14;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
@@ -22,7 +23,6 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 /**
  * Single-pass damage-overlay tint, modeled on modern Minecraft's OverlayTexture.
- * The tint is applied only while the main body model renders.
  */
 @Mixin(RendererLivingEntity.class)
 public class MixinRendererLivingEntity_OverlayTint {
@@ -62,13 +62,20 @@ public class MixinRendererLivingEntity_OverlayTint {
     @Inject(
         method = "doRender(Lnet/minecraft/entity/EntityLivingBase;DDDFF)V",
         at = @At(value = "INVOKE",
-            target = "Lnet/minecraft/client/renderer/entity/RendererLivingEntity;renderModel(Lnet/minecraft/entity/EntityLivingBase;FFFFFF)V",
-            shift = At.Shift.AFTER),
+            target = "Lnet/minecraft/client/renderer/entity/RendererLivingEntity;renderEquippedItems(Lnet/minecraft/entity/EntityLivingBase;F)V"),
         require = 1, expect = 1
     )
-    private void angelica$clearBodyTint(EntityLivingBase entity, double x, double y, double z,
-                                        float yaw, float partialTick, CallbackInfo ci) {
-        angelica$clearOverlayColor();
+    private void angelica$teardownOverlay(EntityLivingBase entity, double x, double y, double z,
+                                          float yaw, float partialTick, CallbackInfo ci) {
+        if (angelica$ffpOverlayActive) {
+            GLStateManager.setOverlayColor(0.0F, 0.0F, 0.0F, 0.0F);
+            angelica$ffpOverlayActive = false;
+        }
+        if (angelica$shaderEntityColorActive) {
+            // Don't tint held items
+            CapturedRenderingState.INSTANCE.setCurrentEntityColor(0.0F, 0.0F, 0.0F, 0.0F);
+            angelica$shaderEntityColorActive = false;
+        }
     }
 
     /**
@@ -91,17 +98,45 @@ public class MixinRendererLivingEntity_OverlayTint {
         original.call(model, entity, p1, p2, p3, p4, p5, p6);
     }
 
+    /**
+     * Skip the overlay on additive passes (emissive eyes, enchantment glint).
+     */
+    @WrapOperation(
+        method = "doRender(Lnet/minecraft/entity/EntityLivingBase;DDDFF)V",
+        at = @At(value = "INVOKE",
+            target = "Lnet/minecraft/client/model/ModelBase;render(Lnet/minecraft/entity/Entity;FFFFFF)V"),
+        slice = @Slice(
+            from = @At(value = "INVOKE",
+                target = "Lnet/minecraft/client/renderer/entity/RendererLivingEntity;shouldRenderPass(Lnet/minecraft/entity/EntityLivingBase;IF)I"),
+            to = @At(value = "INVOKE",
+                target = "Lnet/minecraft/client/renderer/entity/RendererLivingEntity;renderEquippedItems(Lnet/minecraft/entity/EntityLivingBase;F)V")
+        ),
+        require = 1, expect = 1
+    )
+    private void angelica$untintAdditivePass(ModelBase model, Entity entity,
+            float p1, float p2, float p3, float p4, float p5, float p6, Operation<Void> original) {
+        if (!angelica$skipReRender || !angelica$isAdditivePass()) {
+            original.call(model, entity, p1, p2, p3, p4, p5, p6);
+            return;
+        }
+        if (angelica$ffpOverlayActive) {
+            GLStateManager.setOverlayColor(0.0F, 0.0F, 0.0F, 0.0F);
+            original.call(model, entity, p1, p2, p3, p4, p5, p6);
+            GLStateManager.setOverlayColor(1.0F, 0.0F, 0.0F, ANGELICA$RED_MIX);
+        } else if (angelica$shaderEntityColorActive) {
+            CapturedRenderingState.INSTANCE.setCurrentEntityColor(0.0F, 0.0F, 0.0F, 0.0F);
+            original.call(model, entity, p1, p2, p3, p4, p5, p6);
+            CapturedRenderingState.INSTANCE.setCurrentEntityColor(1.0F, 0.0F, 0.0F, ANGELICA$RED_MIX);
+        } else {
+            original.call(model, entity, p1, p2, p3, p4, p5, p6);
+        }
+    }
+
     @Inject(
         method = "doRender(Lnet/minecraft/entity/EntityLivingBase;DDDFF)V",
         at = @At("RETURN")
     )
     private void angelica$reset(CallbackInfo ci) {
-        angelica$clearOverlayColor();
-        angelica$skipReRender = false;
-    }
-
-    @Unique
-    private void angelica$clearOverlayColor() {
         if (angelica$ffpOverlayActive) {
             GLStateManager.setOverlayColor(0.0F, 0.0F, 0.0F, 0.0F);
             angelica$ffpOverlayActive = false;
@@ -110,6 +145,15 @@ public class MixinRendererLivingEntity_OverlayTint {
             CapturedRenderingState.INSTANCE.setCurrentEntityColor(0.0F, 0.0F, 0.0F, 0.0F);
             angelica$shaderEntityColorActive = false;
         }
+        angelica$skipReRender = false;
+    }
+
+    @Unique
+    private static boolean angelica$isAdditivePass() {
+        if (!GLStateManager.glIsEnabled(GL11.GL_BLEND)) return false;
+        if (GLStateManager.glGetInteger(GL14.GL_BLEND_DST_RGB) != GL11.GL_ONE) return false;
+        final int src = GLStateManager.glGetInteger(GL14.GL_BLEND_SRC_RGB);
+        return src == GL11.GL_ONE || src == GL11.GL_SRC_COLOR;
     }
 
     @Unique

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/angelica/glsm/MixinSplashProgressCaching.java

@@ -1,7 +1,6 @@
 package com.gtnewhorizons.angelica.mixins.early.angelica.glsm;
 
 import com.gtnewhorizons.angelica.glsm.GLStateManager;
-import com.gtnewhorizons.angelica.glsm.recording.ImmediateModeRecorder;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.spongepowered.asm.mixin.Mixin;
@@ -27,14 +26,6 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 public class MixinSplashProgressCaching {
     private static final Logger LOGGER = LogManager.getLogger("Angelica");
 
-    /**
-     * Before splash starts, create a separate DirectTessellator for the splash thread.
-     */
-    @Inject(method = "start", at = @At("HEAD"))
-    private static void angelica$initSplashTessellator(CallbackInfo ci) {
-        ImmediateModeRecorder.initSplashTessellator();
-    }
-
     // VAOs aren't shared across GL contexts; the SharedDrawable the client thread just swapped
     // onto has none. Core profile (macOS) rejects glValidateProgram without one.
     @Inject(method = "start", at = @At("RETURN"))
@@ -42,12 +33,8 @@ public class MixinSplashProgressCaching {
         GLStateManager.glBindVertexArray(GLStateManager.glGenVertexArrays());
     }
 
-    /**
-     *  On return from finish() - destroy splash tessellator and mark splash complete
-     */
     @Inject(method = "finish", at = @At("RETURN"))
     private static void angelica$enableCachingOnFinish(CallbackInfo ci) {
-        ImmediateModeRecorder.destroySplashTessellator();
         GLStateManager.markSplashComplete();
         LOGGER.info("Splash Complete");
     }

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/angelica/itemrenderer/MixinItemRenderer.java

@@ -27,6 +27,7 @@ package com.gtnewhorizons.angelica.mixins.early.angelica.itemrenderer;
 
 import com.gtnewhorizon.gtnhlib.client.renderer.DirectTessellator;
 import com.gtnewhorizon.gtnhlib.client.renderer.TessellatorManager;
+import com.gtnewhorizons.angelica.glsm.GLStateManager;
 import com.gtnewhorizons.angelica.rendering.items.ItemRenderListManager;
 import com.llamalad7.mixinextras.injector.wrapmethod.WrapMethod;
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
@@ -43,6 +44,10 @@ public abstract class MixinItemRenderer {
 
     @WrapMethod(method = "renderItemIn2D")
     private static void angelica$cacheItem(Tessellator tessellator, float minU, float minV, float maxU, float maxV, int widthSubdivisions, int heightSubdivisions, float thickness, Operation<Void> original) {
+        if (GLStateManager.isRecordingDisplayList() || TessellatorManager.isCurrentlyCapturing() || TessellatorManager.shouldInterceptDraw(Tessellator.instance)) {
+            original.call(tessellator, minU, minV, maxU, maxV, widthSubdivisions, heightSubdivisions, thickness);
+            return;
+        }
         final ItemRenderListManager.CachedVBO vbo = ItemRenderListManager.pre(minU, minV, maxU, maxV, widthSubdivisions, heightSubdivisions, thickness);
         if (vbo != null) {
             final DirectTessellator tess = TessellatorManager.startCapturingDirect();

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/angelica/itemrenderer/MixinRenderBlocks.java

@@ -1,12 +1,15 @@
 package com.gtnewhorizons.angelica.mixins.early.angelica.itemrenderer;
 
+import com.gtnewhorizon.gtnhlib.client.renderer.TessellatorManager;
 import com.gtnewhorizons.angelica.glsm.GLStateManager;
 import com.gtnewhorizons.angelica.rendering.items.BlockRenderListManager;
 import com.llamalad7.mixinextras.injector.wrapmethod.WrapMethod;
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import net.minecraft.block.Block;
 import net.minecraft.client.renderer.RenderBlocks;
+import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.util.IIcon;
+import net.minecraft.world.IBlockAccess;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
 
@@ -23,6 +26,15 @@ public abstract class MixinRenderBlocks {
     @Shadow
     public IIcon overrideBlockTexture;
 
+    @Shadow public IBlockAccess blockAccess;
+
+    @Shadow public int uvRotateEast;
+    @Shadow public int uvRotateWest;
+    @Shadow public int uvRotateSouth;
+    @Shadow public int uvRotateNorth;
+    @Shadow public int uvRotateTop;
+    @Shadow public int uvRotateBottom;
+
     @WrapMethod(method = "renderBlockAsItem")
     private void angelica$cacheBlockItemRenderer(Block block, int meta, float brightness, Operation<Void> original) {
         if (BlockRenderListManager.isISBRH(block.getRenderType())
@@ -30,6 +42,11 @@ public abstract class MixinRenderBlocks {
             || this.overrideBlockTexture != null
             || brightness != 1.0F
             || !this.useInventoryTint
+            || this.blockAccess != null
+            || (uvRotateEast | uvRotateWest | uvRotateSouth | uvRotateNorth | uvRotateTop | uvRotateBottom) != 0
+            || GLStateManager.isRecordingDisplayList()
+            || TessellatorManager.isCurrentlyCapturing()
+            || TessellatorManager.shouldInterceptDraw(Tessellator.instance)
         ) {
             // Do not cache those
             original.call(block, meta, brightness);

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/celeritas/frustum/MixinClippingHelper.java

@@ -4,6 +4,7 @@ import com.gtnewhorizons.angelica.mixins.interfaces.ClippingHelperExt;
 import net.minecraft.client.renderer.culling.ClippingHelper;
 import org.joml.FrustumIntersection;
 import org.joml.Matrix4f;
+import org.joml.Matrix4fc;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Overwrite;
 import org.spongepowered.asm.mixin.Shadow;
@@ -18,17 +19,24 @@ public class MixinClippingHelper implements ClippingHelperExt {
     @Unique private final FrustumIntersection celeritas$frustumIntersection = new FrustumIntersection();
     @Unique private final Matrix4f celeritas$projMatrix = new Matrix4f();
     @Unique private final Matrix4f celeritas$mvMatrix = new Matrix4f();
+    @Unique private final Matrix4f celeritas$combined = new Matrix4f();
 
     @Override
     public FrustumIntersection celeritas$getFrustumIntersection() {
         return this.celeritas$frustumIntersection;
     }
 
+    @Override
+    public Matrix4fc celeritas$getCombinedMatrix() {
+        return this.celeritas$combined;
+    }
+
     @Override
     public void celeritas$updateFrustumIntersection() {
         this.celeritas$projMatrix.set(this.projectionMatrix);
         this.celeritas$mvMatrix.set(this.modelviewMatrix);
-        this.celeritas$frustumIntersection.set(this.celeritas$projMatrix.mul(this.celeritas$mvMatrix));
+        this.celeritas$combined.set(this.celeritas$projMatrix).mul(this.celeritas$mvMatrix);
+        this.celeritas$frustumIntersection.set(this.celeritas$combined, false);
     }
 
     /**

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/celeritas/frustum/MixinFrustrum.java

@@ -5,23 +5,48 @@ import net.minecraft.client.renderer.culling.ClippingHelper;
 import net.minecraft.client.renderer.culling.Frustrum;
 import org.embeddedt.embeddium.impl.render.viewport.Viewport;
 import org.embeddedt.embeddium.impl.render.viewport.ViewportProvider;
+import org.joml.FrustumIntersection;
 import org.joml.Vector3d;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
 import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(Frustrum.class)
 public abstract class MixinFrustrum implements ViewportProvider {
     @Shadow @Final private ClippingHelper clippingHelper;
     @Shadow private double xPosition, yPosition, zPosition;
 
+    @Unique private final FrustumIntersection celeritas$snapshot = new FrustumIntersection();
+
+    @Inject(method = "<init>", at = @At("RETURN"))
+    private void celeritas$snapshotFrustum(CallbackInfo ci) {
+        this.celeritas$snapshot.set(((ClippingHelperExt) this.clippingHelper).celeritas$getCombinedMatrix(), false);
+    }
+
     @Override
     public Viewport sodium$createViewport() {
         // Shadow frustum subclasses override this via their own ViewportProvider impl.
-        // This default handles vanilla Frustrum only.
+        // This default handles vanilla Frustrum only, using the per-instance snapshot
         return new Viewport(
-            ((ClippingHelperExt) this.clippingHelper).celeritas$getFrustumIntersection()::testAab,
+            this.celeritas$snapshot::testAab,
             new Vector3d(this.xPosition, this.yPosition, this.zPosition)
         );
     }
+
+    @Overwrite
+    public boolean isBoxInFrustum(double minX, double minY, double minZ, double maxX, double maxY, double maxZ) {
+        if (Double.isInfinite(minX) || Double.isInfinite(minY) || Double.isInfinite(minZ)
+            || Double.isInfinite(maxX) || Double.isInfinite(maxY) || Double.isInfinite(maxZ)) {
+            return true;
+        }
+        return this.celeritas$snapshot.testAab(
+            (float) (minX - this.xPosition), (float) (minY - this.yPosition), (float) (minZ - this.zPosition),
+            (float) (maxX - this.xPosition), (float) (maxY - this.yPosition), (float) (maxZ - this.zPosition)
+        );
+    }
 }

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/celeritas/terrain/ChunkTrackerAccessor.java

@@ -1,23 +0,0 @@
-package com.gtnewhorizons.angelica.mixins.early.celeritas.terrain;
-
-import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap;
-import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
-import it.unimi.dsi.fastutil.longs.LongSet;
-import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTracker;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.gen.Accessor;
-
-@Mixin(ChunkTracker.class)
-public interface ChunkTrackerAccessor extends com.gtnewhorizons.angelica.mixins.interfaces.ChunkTrackerAccessor {
-    @Accessor("chunkStatus")
-    Long2IntOpenHashMap angelica$getChunkStatus();
-
-    @Accessor("chunkReady")
-    LongOpenHashSet angelica$getChunkReady();
-
-    @Accessor("unloadQueue")
-    LongSet angelica$getUnloadQueue();
-
-    @Accessor("loadQueue")
-    LongSet angelica$getLoadQueue();
-}

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/celeritas/terrain/MixinChunk.java

@@ -2,11 +2,6 @@ package com.gtnewhorizons.angelica.mixins.early.celeritas.terrain;
 
 import java.util.Map;
 
-import com.gtnewhorizon.gtnhlib.hash.Fnv1a64;
-import com.gtnewhorizons.angelica.event.ChunkBiomeDataChangedEvent;
-import com.gtnewhorizons.angelica.mixins.interfaces.IChunkTileEntityMapHolder;
-import com.gtnewhorizons.angelica.rendering.RenderThreadContext;
-import com.gtnewhorizons.angelica.utils.ConcurrentTileEntityMap;
 import net.minecraft.block.Block;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.world.ChunkPosition;
@@ -25,10 +20,17 @@ import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.Redirect;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
+import com.gtnewhorizon.gtnhlib.hash.Fnv1a64;
+import com.gtnewhorizons.angelica.compat.ModStatus;
+import com.gtnewhorizons.angelica.event.ChunkBiomeDataChangedEvent;
+import com.gtnewhorizons.angelica.mixins.interfaces.IChunkTileEntityMapHolder;
+import com.gtnewhorizons.angelica.rendering.RenderThreadContext;
+import com.gtnewhorizons.angelica.utils.ConcurrentTileEntityMap;
+
 @Mixin(Chunk.class)
 public abstract class MixinChunk implements IChunkTileEntityMapHolder {
 
-    @Shadow public Map<ChunkPosition, TileEntity> chunkTileEntityMap = new ConcurrentTileEntityMap();
+    @Shadow public Map<ChunkPosition, TileEntity> chunkTileEntityMap;
     @Shadow public World worldObj;
     @Shadow private ExtendedBlockStorage[] storageArrays;
     @Final @Shadow public int xPosition;
@@ -41,6 +43,16 @@ public abstract class MixinChunk implements IChunkTileEntityMapHolder {
     @Unique private long angelica$biomeHash;
     @Unique private boolean angelica$biomeHashValid;
 
+    @Inject(method = "<init>", at = @At("TAIL"))
+    private void angelica$wrapTEMapIfNeeded(CallbackInfo ci) {
+        // Wrap the cubic chunks map, since it uses a custom map
+        if (ModStatus.isCubicChunksLoaded) {
+            this.chunkTileEntityMap = new ConcurrentTileEntityMap(this.chunkTileEntityMap);
+        } else {
+            this.chunkTileEntityMap = new ConcurrentTileEntityMap();
+        }
+    }
+
     @Override
     public ConcurrentTileEntityMap angelica$getConcurrentTEMap() {
         return (ConcurrentTileEntityMap) this.chunkTileEntityMap;

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/celeritas/terrain/MixinWorldClient.java

@@ -1,19 +1,22 @@
 package com.gtnewhorizons.angelica.mixins.early.celeritas.terrain;
 
-import com.gtnewhorizons.angelica.rendering.celeritas.AngelicaChunkTracker;
-import com.gtnewhorizons.angelica.rendering.celeritas.SmoothBiomeColorCache;
-import com.gtnewhorizons.angelica.rendering.celeritas.WorldClientExtension;
 import net.minecraft.client.multiplayer.WorldClient;
 import net.minecraft.world.IBlockAccess;
+
 import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTracker;
 import org.embeddedt.embeddium.impl.render.chunk.map.ChunkTrackerHolder;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Unique;
 
+import com.gtnewhorizons.angelica.compat.ModStatus;
+import com.gtnewhorizons.angelica.rendering.celeritas.AngelicaChunkTracker;
+import com.gtnewhorizons.angelica.rendering.celeritas.CubeStatusTracker;
+import com.gtnewhorizons.angelica.rendering.celeritas.SmoothBiomeColorCache;
+import com.gtnewhorizons.angelica.rendering.celeritas.WorldClientExtension;
 
 @Mixin(WorldClient.class)
 public class MixinWorldClient implements ChunkTrackerHolder, WorldClientExtension {
-    @Unique private final ChunkTracker celeritas$tracker = new AngelicaChunkTracker();
+    @Unique private final ChunkTracker celeritas$tracker = ModStatus.isCubicChunksLoaded ? new CubeStatusTracker() : new AngelicaChunkTracker();
     @Unique private final SmoothBiomeColorCache celeritas$smoothBiomeColorCache = new SmoothBiomeColorCache((IBlockAccess) this);
 
     @Override

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/notfine/clouds/MixinEntityRenderer.java

@@ -1,5 +1,7 @@
 package com.gtnewhorizons.angelica.mixins.early.notfine.clouds;
 
+import com.gtnewhorizons.angelica.config.AngelicaConfig;
+import com.gtnewhorizons.angelica.render.CloudRenderer;
 import jss.notfine.core.SettingsManager;
 import net.minecraft.client.renderer.EntityRenderer;
 import org.spongepowered.asm.mixin.Mixin;
@@ -12,7 +14,11 @@ import org.spongepowered.asm.mixin.injection.ModifyConstant;
 public abstract class MixinEntityRenderer {
     @ModifyArg(method = "setupCameraTransform", at = @At(value = "INVOKE", target = "Lorg/lwjgl/util/glu/Project;gluPerspective(FFFF)V", remap = false), index = 3)
     private float notFine$modifyFarPlane(float original) {
-        return Math.max(original, SettingsManager.minimumFarPlaneDistance);
+        float required = SettingsManager.minimumFarPlaneDistance;
+        if (AngelicaConfig.enableVBOClouds) {
+            required = Math.max(required, CloudRenderer.getCloudRenderer().getRequiredFarPlaneDistance());
+        }
+        return Math.max(original, required);
     }
 
 }

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/rendering/BlockLiquidFlowInvoker.java

@@ -0,0 +1,14 @@
+package com.gtnewhorizons.angelica.mixins.early.rendering;
+
+import net.minecraft.block.BlockLiquid;
+import net.minecraft.util.Vec3;
+import net.minecraft.world.IBlockAccess;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(BlockLiquid.class)
+public interface BlockLiquidFlowInvoker {
+
+    @Invoker("getFlowVector")
+    Vec3 angelica$getFlowVector(IBlockAccess world, int x, int y, int z);
+}

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/rendering/MixinBlockLiquid.java

@@ -0,0 +1,22 @@
+package com.gtnewhorizons.angelica.mixins.early.rendering;
+
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockLiquid;
+import net.minecraft.util.Vec3;
+import net.minecraft.world.IBlockAccess;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(BlockLiquid.class)
+public class MixinBlockLiquid {
+
+    @Redirect(
+        method = "getFlowDirection",
+        at = @At(value = "INVOKE", target = "Lnet/minecraft/block/BlockLiquid;getFlowVector(Lnet/minecraft/world/IBlockAccess;III)Lnet/minecraft/util/Vec3;"))
+    private static Vec3 angelica$flowVectorOfActualBlock(BlockLiquid singleton, IBlockAccess world, int x, int y, int z) {
+        final Block block = world.getBlock(x, y, z);
+        final BlockLiquid liquid = block instanceof BlockLiquid ? (BlockLiquid) block : singleton;
+        return ((BlockLiquidFlowInvoker) liquid).angelica$getFlowVector(world, x, y, z);
+    }
+}

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/rendering/MixinRenderBlocks.java

@@ -1,5 +1,6 @@
 package com.gtnewhorizons.angelica.mixins.early.rendering;
 
+import com.gtnewhorizons.angelica.api.ExtCeleritasRenderBlocks;
 import com.gtnewhorizons.angelica.common.BlockError;
 import com.gtnewhorizons.angelica.loading.AngelicaClientTweaker;
 import com.gtnewhorizons.angelica.proxy.ClientProxy;
@@ -21,6 +22,7 @@ import net.minecraft.client.renderer.RenderBlocks;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.util.IIcon;
 import net.minecraft.world.IBlockAccess;
+import net.minecraftforge.common.util.ForgeDirection;
 import org.objectweb.asm.Opcodes;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -32,7 +34,7 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
 @Mixin(RenderBlocks.class)
-public abstract class MixinRenderBlocks {
+public abstract class MixinRenderBlocks implements ExtCeleritasRenderBlocks {
     @Shadow
     public abstract boolean renderStandardBlockWithColorMultiplier(Block p_147736_1_, int p_147736_2_, int p_147736_3_, int p_147736_4_, float p_147736_5_, float p_147736_6_, float p_147736_7_);
 
@@ -108,8 +110,7 @@ public abstract class MixinRenderBlocks {
      */
     @Inject(method = { "renderStandardBlockWithAmbientOcclusion", "renderStandardBlockWithAmbientOcclusionPartial" }, at = @At("HEAD"), cancellable = true)
     private void handleCeleritasAo(Block block, int x, int y, int z, float r, float g, float b, CallbackInfoReturnable<Boolean> cir) {
-        if ((this.isRenderingByType && Minecraft.isAmbientOcclusionEnabled() && ClientProxy.options().quality.useCeleritasSmoothLighting) ||
-            (Iris.enabled && BlockRenderingSettings.INSTANCE.shouldUseSeparateAo())) {
+        if (angelica$shouldApplyCeleritasAO()) {
             this.applyingCeleritasAO = true;
             try {
                 cir.setReturnValue(this.renderStandardBlockWithColorMultiplier(block, x, y, z, r, g, b));
@@ -119,6 +120,17 @@ public abstract class MixinRenderBlocks {
         }
     }
 
+    @Override
+    public boolean angelica$shouldApplyCeleritasAO() {
+        return (this.isRenderingByType && Minecraft.isAmbientOcclusionEnabled() && ClientProxy.options().quality.useCeleritasSmoothLighting) ||
+            (Iris.enabled && BlockRenderingSettings.INSTANCE.shouldUseSeparateAo());
+    }
+
+    @Override
+    public void angelica$setApplyingCeleritasAO(boolean val) {
+        this.applyingCeleritasAO = val;
+    }
+
     /**
      * Widen the grass identity check ({@code block != Blocks.grass}) to cover any BlockGrass subclass
      * (e.g. BOP's loamy/sandy/silty grass). When the block being rendered IS a BlockGrass, we return
@@ -185,7 +197,7 @@ public abstract class MixinRenderBlocks {
     public IBlockAccess blockAccess;
 
     @Unique
-    private void angelica$handleCompactCtmFace(IIcon icon, CallbackInfo ci) {
+    private void angelica$handleCompactCtmFace(IIcon icon, ForgeDirection direction, CallbackInfo ci) {
         CTMUtils.CTMCompactContext ctx = CTMUtils.getCurrentCompact();
         if (ctx == null) {
             return;
@@ -197,43 +209,48 @@ public abstract class MixinRenderBlocks {
             return;
         }
 
-        if (processor.processFace((RenderBlocks)(Object)this, renderBlockState, icon)) {
+        if (processor.processFace((RenderBlocks)(Object)this, renderBlockState, icon, direction.ordinal())) {
             ci.cancel();
         }
     }
 
     @Inject(method = "renderFaceYNeg", at = @At("HEAD"), cancellable = true)
     private void compactCtm_onRenderFaceYNeg(Block block, double x, double y, double z, IIcon icon, CallbackInfo ci) {
-        angelica$handleCompactCtmFace(icon, ci);
+        angelica$handleCompactCtmFace(icon, ForgeDirection.DOWN, ci);
     }
 
     @Inject(method = "renderFaceYPos", at = @At("HEAD"), cancellable = true)
     private void compactCtm_onRenderFaceYPos(Block block, double x, double y, double z, IIcon icon, CallbackInfo ci) {
-        angelica$handleCompactCtmFace(icon, ci);
+        angelica$handleCompactCtmFace(icon, ForgeDirection.UP, ci);
     }
 
     @Inject(method = "renderFaceZNeg", at = @At("HEAD"), cancellable = true)
     private void compactCtm_onRenderFaceZNeg(Block block, double x, double y, double z, IIcon icon, CallbackInfo ci) {
-        angelica$handleCompactCtmFace(icon, ci);
+        angelica$handleCompactCtmFace(icon, ForgeDirection.NORTH, ci);
     }
 
     @Inject(method = "renderFaceZPos", at = @At("HEAD"), cancellable = true)
     private void compactCtm_onRenderFaceZPos(Block block, double x, double y, double z, IIcon icon, CallbackInfo ci) {
-        angelica$handleCompactCtmFace(icon, ci);
+        angelica$handleCompactCtmFace(icon, ForgeDirection.SOUTH, ci);
     }
 
     @Inject(method = "renderFaceXNeg", at = @At("HEAD"), cancellable = true)
     private void compactCtm_onRenderFaceXNeg(Block block, double x, double y, double z, IIcon icon, CallbackInfo ci) {
-        angelica$handleCompactCtmFace(icon, ci);
+        angelica$handleCompactCtmFace(icon, ForgeDirection.WEST, ci);
     }
 
     @Inject(method = "renderFaceXPos", at = @At("HEAD"), cancellable = true)
     private void compactCtm_onRenderFaceXPos(Block block, double x, double y, double z, IIcon icon, CallbackInfo ci) {
-        angelica$handleCompactCtmFace(icon, ci);
+        angelica$handleCompactCtmFace(icon, ForgeDirection.EAST, ci);
     }
 
     @Inject(method = "renderStandardBlock(Lnet/minecraft/block/Block;III)Z", at = @At("RETURN"))
     private void compactCtm_resetAfterBlock(Block block, int x, int y, int z, CallbackInfoReturnable<Boolean> cir) {
         CTMUtils.clearCurrentCompact();
     }
+
+    @Inject(method = "renderBlockAsItem", at = @At("HEAD"))
+    private void compactCtm_resetBeforeItem(Block block, int meta, float brightness, CallbackInfo ci) {
+        CTMUtils.clearCurrentCompact();
+    }
 }

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/shaders/AccessorModelBox.java

@@ -0,0 +1,13 @@
+package com.gtnewhorizons.angelica.mixins.early.shaders;
+
+import net.minecraft.client.model.ModelBox;
+import net.minecraft.client.model.TexturedQuad;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(ModelBox.class)
+public interface AccessorModelBox {
+
+    @Accessor("quadList")
+    TexturedQuad[] angelica$getQuadList();
+}

src/mixin/java/com/gtnewhorizons/angelica/mixins/early/shaders/MixinModelBiped.java

@@ -0,0 +1,90 @@
+package com.gtnewhorizons.angelica.mixins.early.shaders;
+
+import com.gtnewhorizons.angelica.rendering.PlayerReflectionCapture;
+import net.minecraft.client.model.ModelBiped;
+import net.minecraft.client.model.ModelBox;
+import net.minecraft.client.model.ModelRenderer;
+import net.minecraft.client.model.PositionTextureVertex;
+import net.minecraft.client.model.TexturedQuad;
+import net.minecraft.entity.Entity;
+import org.joml.Matrix4f;
+import org.joml.Vector3f;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.Unique;
+
+import java.util.Arrays;
+
+@Mixin(ModelBiped.class)
+public abstract class MixinModelBiped {
+
+    @Unique private static final Matrix4f angelica$mat = new Matrix4f();
+    @Unique private static final Vector3f angelica$vec = new Vector3f();
+
+    @Inject(method = "render(Lnet/minecraft/entity/Entity;FFFFFF)V", at = @At("RETURN"))
+    private void angelica$capturePlayerReflection(Entity entity, float limbSwing, float limbSwingAmount,
+        float ageInTicks, float netHeadYaw, float headPitch, float scale, CallbackInfo ci) {
+
+        if (!PlayerReflectionCapture.shouldCapture()) return;
+        if ((Object) this != PlayerReflectionCapture.getTarget()) return;
+        if (entity != PlayerReflectionCapture.getTargetEntity()) return;
+
+        final ModelBiped model = (ModelBiped) (Object) this;
+        final float[] data = PlayerReflectionCapture.vertexScratch();
+
+        // Six 48-vertex blocks = body parts, each base box + overlay box
+        int o = 0;
+        o = angelica$emitBox(model.bipedHead,       data, o, scale);
+        o = angelica$emitBox(model.bipedHeadwear,   data, o, scale);
+        o = angelica$emitBox(model.bipedRightArm,   data, o, scale);
+        o = angelica$emitBox(model.bipedRightArm,   data, o, scale);
+        o = angelica$emitBox(model.bipedLeftLeg,    data, o, scale);
+        o = angelica$emitBox(model.bipedLeftLeg,    data, o, scale);
+        o = angelica$emitBox(model.bipedLeftArm,    data, o, scale);
+        o = angelica$emitBox(model.bipedLeftArm,    data, o, scale);
+        o = angelica$emitBox(model.bipedRightLeg,   data, o, scale);
+        o = angelica$emitBox(model.bipedRightLeg,   data, o, scale);
+        o = angelica$emitBox(model.bipedBody,       data, o, scale);
+            angelica$emitBox(model.bipedBody,       data, o, scale);
+
+        PlayerReflectionCapture.drawPlayerCapture(data);
+    }
+
+    private static int angelica$emitBox(ModelRenderer part, float[] out, int o, float scale) {
+        if (part == null || part.cubeList == null || part.cubeList.isEmpty()) {
+            final int end = o + 24 * PlayerReflectionCapture.FLOATS_PER_VERTEX;
+            Arrays.fill(out, o, end, 0.0f);
+            return end;
+        }
+
+        final Matrix4f m = angelica$mat.identity();
+        m.translate(part.offsetX, part.offsetY, part.offsetZ);
+        m.translate(part.rotationPointX * scale, part.rotationPointY * scale, part.rotationPointZ * scale);
+        if (part.rotateAngleZ != 0.0f) m.rotateZ(part.rotateAngleZ);
+        if (part.rotateAngleY != 0.0f) m.rotateY(part.rotateAngleY);
+        if (part.rotateAngleX != 0.0f) m.rotateX(part.rotateAngleX);
+
+        final ModelBox box = part.cubeList.getFirst();
+        final TexturedQuad[] quads = ((AccessorModelBox) (Object) box).angelica$getQuadList();
+        final Vector3f v = angelica$vec;
+
+        for (int q = 0; q < 6; q++) {
+            final PositionTextureVertex[] corners = quads[q].vertexPositions;
+            for (int c = 0; c < 4; c++) {
+                final PositionTextureVertex corner = corners[c];
+                v.set((float) corner.vector3D.xCoord * scale,
+                      (float) corner.vector3D.yCoord * scale,
+                      (float) corner.vector3D.zCoord * scale);
+                m.transformPosition(v);
+                out[o++] = v.x;
+                out[o++] = v.y;
+                out[o++] = v.z;
+                out[o++] = corner.texturePositionX;
+                out[o++] = corner.texturePositionY * 0.5f;
+            }
+        }
+        return o;
+    }
+}

src/mixin/java/com/gtnewhorizons/angelica/mixins/late/client/farseek/MixinFarseekIBlockAccessValue.java

@@ -0,0 +1,22 @@
+package com.gtnewhorizons.angelica.mixins.late.client.farseek;
+
+import com.gtnewhorizons.angelica.rendering.celeritas.world.WorldSlice;
+import net.minecraft.world.IBlockAccess;
+import net.minecraft.world.WorldProvider;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Pseudo;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Pseudo
+@Mixin(targets = "farseek.world.package$IBlockAccessValue$", remap = false)
+public class MixinFarseekIBlockAccessValue {
+
+    @Inject(method = "worldProvider$extension", at = @At("HEAD"), cancellable = true, remap = false)
+    private void angelica$worldSliceProvider(IBlockAccess bac, CallbackInfoReturnable<WorldProvider> cir) {
+        if (bac instanceof WorldSlice slice) {
+            cir.setReturnValue(slice.getWorld().provider);
+        }
+    }
+}

umbra/dependencies.gradle

@@ -33,8 +33,8 @@ dependencies {
     }
     shadowImplementation("org.antlr:antlr4-runtime:4.13.2")
 
-    embedOnly("org.embeddedt.celeritas:celeritas-common:2.5.4-GTNH") { transitive = false }
+    embedOnly("org.embeddedt.celeritas:celeritas-common:2.5.5-GTNH) { transitive = false }
     embedOnly("org.embeddedt.celeritas:celeritas-lwjgl2-service:2.5.3-GTNH") { transitive = false }
-    runtimeOnlyNonPublishable("org.embeddedt.celeritas:celeritas-common:2.5.4-GTNH") { transitive = false }
+    runtimeOnlyNonPublishable("org.embeddedt.celeritas:celeritas-common:2.5.5-GTNH") { transitive = false }
     runtimeOnlyNonPublishable("org.embeddedt.celeritas:celeritas-lwjgl2-service:2.5.3-GTNH") { transitive = false }
 }