thanks for your reply, i am using maya 6.0 (shame). The advice was helpful and im very grateful. I wondered if could pose another question to you, im using MR DGS materials in maya 6.0. When using the multipass rendering options i find that the outputs dont evaluate properly. Does anyone know a quick solution for this problem? My alternative is to write an output shader, which i have done already, i've rebuilt the DGS material with new calls to mi_fb_put etc. However im not sure when or what are the actual diffuse, gllosy, spec variables after the shader calcs, its seems that everything is accumulated in *result.
Please help me....