Hey! Small note that I picked up while using BadCoderz.

It seems as if SCS uses VGUI Material, specifically GM:PostDrawTranslucentRenderables, which is called after all translucent entities are drawn. This is better done by caching materials instead of rendering them live. You can see more information here on the FacePunch Wiki.[wiki.facepunch.com]

Hope this helps. I really like this addon, I don't want to remove it due to frame loss :)