As a little FYI, CATS seems to like to break the weight painting on this if you were wondering what breaks when you do that. Managed to fix it, but it took me about 8 hours to figure that out. Modify this at your own risk of migraine.
Because i wasn't sure if i'm allowed to distribute the shader i used. but it's also pink in color if that stuck with it, because i enjoy messing with people.