I've been down this road several times. You can get it to work ALMOST! It will crap out on you right at the frame or two when you're almost completely invisible. The way I've done it is to make your shader tree a multi channel mixer with your original shader tree in the first channel, transparency in the second with a value of 100% mixed with a value you use to animate. There are several threads in the forum which talk about how to do transparency. Take a search and see what you find. -Kix

-Kix