Fix chunk layer assignment

Author: liamlutton

Runtime/Code/VoxelWorld/VoxelWorldChunk.cs

@@ -481,6 +481,7 @@ private bool DoHeadlessUpdate(VoxelWorld world) {
 
                 if (obj == null) {
                     obj = newChunk;
+                    obj.layer = world.gameObject.layer;
                     obj.transform.parent = parent.transform;
                     obj.transform.localRotation = Quaternion.identity;
                     obj.transform.localScale = Vector3.one;