Since Vrscene has been implemented in Vray 3.6 for SketchUp I have stopped using V-ray proxy in my workflow, because it much stable and it offload all the visualaization objetcs (geometries, materials and lights) out of SketchUp, so as I could focus on what is going to be desingned and built.
Having that option in Transmutr would be useful for who want to SketchUp for documentation.