diff --git a/LEGO1/tgl/d3drm/impl.h b/LEGO1/tgl/d3drm/impl.h
index a5307e1a..35553ee3 100644
--- a/LEGO1/tgl/d3drm/impl.h
+++ b/LEGO1/tgl/d3drm/impl.h
@@ -114,6 +114,7 @@ class RendererImpl : public Renderer {
 		unsigned long height,
 		ViewImpl& rView
 	);
+	inline Result CreateMeshBuilder(MeshBuilderImpl& rMesh);
 
 private:
 	RendererDataType m_data;
@@ -411,10 +412,9 @@ class MeshImpl : public Mesh {
 
 	typedef MeshData* MeshDataType;
 
-	// FUNCTION: BETA10 0x10170420
 	const MeshDataType& ImplementationData() const { return m_data; }
 
-	// FUNCTION: BETA10 0x10170440
+	// FUNCTION: BETA10 0x10171b70
 	MeshDataType& ImplementationData() { return m_data; }
 
 	inline void Destroy();
@@ -532,7 +532,10 @@ class MeshBuilderImpl : public MeshBuilder {
 
 	typedef IDirect3DRMMesh* MeshBuilderDataType;
 
+	// FUNCTION: BETA10 0x10170420
 	const MeshBuilderDataType& ImplementationData() const { return m_data; }
+
+	// FUNCTION: BETA10 0x10170440
 	MeshBuilderDataType& ImplementationData() { return m_data; }
 
 	inline void Destroy();
diff --git a/LEGO1/tgl/d3drm/renderer.cpp b/LEGO1/tgl/d3drm/renderer.cpp
index 11c387ac..a275825a 100644
--- a/LEGO1/tgl/d3drm/renderer.cpp
+++ b/LEGO1/tgl/d3drm/renderer.cpp
@@ -279,14 +279,33 @@ Light* RendererImpl::CreateLight(LightType type, float r, float g, float b)
 	return pLightImpl;
 }
 
+// FUNCTION: BETA10 0x1016d8e0
+inline Result RendererCreateMeshBuilder(IDirect3DRM2* pD3DRM, IDirect3DRMMesh*& rpMesh)
+{
+	return ResultVal(pD3DRM->CreateMesh(&rpMesh));
+}
+
+// FUNCTION: BETA10 0x1016d850
+inline Result RendererImpl::CreateMeshBuilder(MeshBuilderImpl& rMesh)
+{
+	assert(m_data);
+	assert(!rMesh.ImplementationData());
+
+	return RendererCreateMeshBuilder(m_data, rMesh.ImplementationData());
+}
+
 // FUNCTION: LEGO1 0x100a1e90
+// FUNCTION: BETA10 0x1016abf0
 MeshBuilder* RendererImpl::CreateMeshBuilder()
 {
+	assert(m_data);
 	MeshBuilderImpl* meshBuilder = new MeshBuilderImpl();
-	if (FAILED(m_data->CreateMesh(&meshBuilder->m_data))) {
+
+	if (!CreateMeshBuilder(*static_cast<MeshBuilderImpl*>(meshBuilder))) {
 		delete meshBuilder;
 		meshBuilder = NULL;
 	}
+
 	return meshBuilder;
 }