If that thread doesn't help, here's the code to make your own. You just need to replace the body part names with the ones you want to use, then save it with a .pz2 extension and apply it like a normal MAT file. mac { version { number 4.01 } actor back_wall:1 { castsShadow 1 } actor left_wall:1 { castsShadow 1 } actor right_wall:1 { castsShadow 1 } actor front_wall:1 { castsShadow 1 } actor ceiling:1 { castsShadow 1 } }