Originally posted by mtmckinley ah, I suppose that's true. One way to get around that is the Layered Shader... it's made to be able to key from one material to another. that is only half true. it works with solid material real well. or if you want to combine differant kinds of shaders like: the highlight of a phong e + reflection of blinn + color of lambert. but layered shader comes to its limit if you want to switch between a half transparent material and another half transparent material.