Thanks, Vlad! I was hoping you'd have some info... I am able to get the SSS simple skin shader to work until I try to add in a bump shader. After that the error messages start popping up saying things like; mentalrayTexture1 not referenced. I'm going to spend some time this week end trying to figure this thing out. I'm sure I have all the info that is needed. Now I just have to understand it.. Thanks again.