diff --git a/meshers/transgreedy.js b/meshers/transgreedy.js
index 321a2e0..87ae7c6 100644
--- a/meshers/transgreedy.js
+++ b/meshers/transgreedy.js
@@ -21,13 +21,7 @@ function removeFlags(v) {
   return (v & kNoFlagsMask);
 }
 
-function getType(voxels, offset) {
-  // return voxels[offset];
-  var type = voxels[offset];
-  return type | (type in kTransparentTypes ? kTransparentMask : 0);
-}
-
-return function ohSoGreedyMesher(volume, dims) {
+return function ohSoGreedyMesher(volume, dims, mesherExtraData) {
   var vertices = [], faces = []
     , dimsX = dims[0]
     , dimsY = dims[1]
@@ -35,6 +29,13 @@ return function ohSoGreedyMesher(volume, dims) {
 
   var tVertices = [], tFaces = []
 
+  var transparentTypes = mesherExtraData ? (mesherExtraData.transparentTypes || {}) : {};
+  var getType = function(voxels, offset) {
+    var type = voxels[offset];
+    return type | (type in transparentTypes ? kTransparentMask : 0);
+  }
+
+
   //Sweep over 3-axes
   for(var d=0; d<3; ++d) {
     var i, j, k, l, w, W, h, n, c