Don't stupidly recalculate renderType lookup table for each section

src/mcedit2/rendering/chunkupdate.py

@@ -198,10 +198,6 @@ class SectionUpdate(object):
         # 2: item?
         # 3: block model
 
-        self.renderType = numpy.zeros((256*256,), 'uint8')
-        for block in self.blocktypes:
-            self.renderType[block.ID] = block.renderType
-
 
 
     @property
@@ -284,10 +280,9 @@ class SectionUpdate(object):
     def blocktypes(self):
         return self.chunkUpdate.chunk.blocktypes
 
-    @lazyprop
-    def blockRenderTypes(self):
-        blockRenderTypes = self.renderType[self.Blocks]
-        return blockRenderTypes
+    @property
+    def renderType(self):
+        return self.chunkUpdate.updateTask.renderType
 
     @lazyprop
     def exposedBlockMasks(self):

src/mcedit2/rendering/worldscene.py

@@ -5,6 +5,7 @@ from __future__ import absolute_import, division, print_function, unicode_litera
 import logging
 import sys
 import collections
+import numpy
 
 from mcedit2.rendering.layers import Layer
 from mcedit2.rendering import chunkupdate, scenegraph
@@ -56,6 +57,10 @@ class SceneUpdateTask(object):
 
         self.textureAtlas = textureAtlas
 
+        self.renderType = numpy.zeros((256*256,), 'uint8')
+        for block in self.worldScene.dimension.blocktypes:
+            self.renderType[block.ID] = block.renderType
+
     overheadMode = False
 
     maxWorkFactor = 64