blockWithID will synthesize a Block without "registering" it with the MCMaterials object.

i'm starting to think the Block object is becoming very silly.

materials.py

@@ -161,9 +161,7 @@ class MCMaterials(object):
         if (id,data) in self.blocksByID:
             return self.blocksByID[id,data]
         else:
-            block = self.Block(id, blockData=data)
-            self.blocksByID[id,data] = block
-            return block
+            return Block(self, id, blockData=data)
             
     def Block(self, blockID, blockData = 0, **kw):
         block = Block(self, blockID, blockData, **kw)