diff --git a/library/PolyVoxCore/include/IndexedSurfacePatch.h b/library/PolyVoxCore/include/IndexedSurfacePatch.h
index aa1b9a8e..39e01b6b 100644
--- a/library/PolyVoxCore/include/IndexedSurfacePatch.h
+++ b/library/PolyVoxCore/include/IndexedSurfacePatch.h
@@ -45,7 +45,7 @@ namespace PolyVox
 	   uint32_t getNoOfNonUniformTrianges(void) const;
 	   uint32_t getNoOfUniformTrianges(void) const;
 	   uint32_t getNoOfVertices(void) const;	   
-	   std::vector<SurfaceVertex>& getRawVertexData(void); //FIXME - this shoudl be removed
+	   std::vector<SurfaceVertex>& getRawVertexData(void); //FIXME - this should be removed
 	   const std::vector<SurfaceVertex>& getVertices(void) const;
 
 	   void addTriangle(uint32_t index0, uint32_t index1, uint32_t index2);
diff --git a/library/PolyVoxCore/include/SurfaceVertex.h b/library/PolyVoxCore/include/SurfaceVertex.h
index bc33d55f..14e06aee 100644
--- a/library/PolyVoxCore/include/SurfaceVertex.h
+++ b/library/PolyVoxCore/include/SurfaceVertex.h
@@ -48,8 +48,9 @@ namespace PolyVox
 	public:		
 		Vector3DFloat position;
 		Vector3DFloat normal;
-		float material;
+		float material; //FIXME: This shouldn't be float on CPU?
 		bool m_bIsEdgeVertex;
+		bool m_bIsMaterialEdgeVertex;
 			
 	};
 
diff --git a/library/PolyVoxCore/source/IndexedSurfacePatch.cpp b/library/PolyVoxCore/source/IndexedSurfacePatch.cpp
index f22055eb..c64354e0 100644
--- a/library/PolyVoxCore/source/IndexedSurfacePatch.cpp
+++ b/library/PolyVoxCore/source/IndexedSurfacePatch.cpp
@@ -95,6 +95,13 @@ namespace PolyVox
 		m_vecTriangleIndices.push_back(index0);
 		m_vecTriangleIndices.push_back(index1);
 		m_vecTriangleIndices.push_back(index2);
+
+		if((m_vecVertices[index0].material != m_vecVertices[index1].material) || (m_vecVertices[index0].material != m_vecVertices[index2].material))
+		{
+			m_vecVertices[index0].m_bIsMaterialEdgeVertex = true;
+			m_vecVertices[index1].m_bIsMaterialEdgeVertex = true;
+			m_vecVertices[index2].m_bIsMaterialEdgeVertex = true;
+		}
 	}
 
 	uint32_t IndexedSurfacePatch::addVertex(const SurfaceVertex& vertex)
diff --git a/library/PolyVoxCore/source/SurfaceVertex.cpp b/library/PolyVoxCore/source/SurfaceVertex.cpp
index 159cdc5f..33c0483a 100644
--- a/library/PolyVoxCore/source/SurfaceVertex.cpp
+++ b/library/PolyVoxCore/source/SurfaceVertex.cpp
@@ -32,6 +32,7 @@ namespace PolyVox
 	SurfaceVertex::SurfaceVertex(Vector3DFloat positionToSet, float materialToSet)
 		:position(positionToSet)
 		,material(materialToSet)
+		,m_bIsMaterialEdgeVertex(false)
 	{
 		
 	}
@@ -40,6 +41,7 @@ namespace PolyVox
 		:position(positionToSet)
 		,normal(normalToSet)
 		,material(materialToSet)
+		,m_bIsMaterialEdgeVertex(false)
 	{
 	}