Let upright posts support torches on top.

src/codechicken/microblock/EdgeMicroblock.scala

@@ -259,4 +259,6 @@ class PostMicroblock(shape$:Byte = 0, material$:Int = 0) extends Microblock(shap
     }
 
     def getResistanceFactor = PostMicroClass.getResistanceFactor
+
+    override def canPlaceTorchOnTop = getShape == 0
 }

src/codechicken/multipart/BlockMultipart.scala

@@ -74,6 +74,12 @@ class BlockMultipart extends Block(Material.rock)
     override def isSideSolid(world:IBlockAccess, x:Int, y:Int, z:Int, side:ForgeDirection):Boolean =
         isBlockSolid(world, x, y, z, side.ordinal())
 
+    override def canPlaceTorchOnTop(world:World, x:Int, y:Int, z:Int) =
+        getTile(world, x, y, z) match {
+            case null => false
+            case tile => tile.canPlaceTorchOnTop
+        }
+
     override def onNeighborBlockChange(world:World, x:Int, y:Int, z:Int, block:Block) {
         val tile = getTile(world, x, y, z)
         if(tile != null) 

src/codechicken/multipart/TMultiPart.scala

@@ -114,6 +114,11 @@ abstract class TMultiPart
      */
     def getLightValue = 0
 
+    /**
+     * If any part returns true for this, torches can be placed. Vanilla hacks...
+     */
+    def canPlaceTorchOnTop = false
+
     /**
      * Explosion resistance of the host tile is the maximum explosion resistance of the contained parts
      * @param entity The entity responsible for this explosion

src/codechicken/multipart/TileMultipart.scala

@@ -206,15 +206,13 @@ class TileMultipart extends TileEntity with IChunkLoadTile
         worldObj.notifyBlocksOfNeighborChange(pos.x, pos.y, pos.z, MultipartProxy.block)
     }
     
-    def isSolid(side:Int):Boolean = 
-    {
-        val part = partMap(side)
-        if(part != null) 
-            return part.asInstanceOf[TFacePart].solid(side)
-        
-        return false
+    def isSolid(side:Int) = partMap(side) match {
+        case face:TFacePart => face.solid(side)
+        case _ => false
     }
-    
+
+    def canPlaceTorchOnTop = partList.exists(_.canPlaceTorchOnTop) || isSolid(1)
+
     private def setTicking(tick:Boolean)
     {
         if(doesTick == tick)