Matte/shadow mat'l

[Percy_xue]

I want to render matte/shadow object like in max w/ vray. I select objects and in the System popup set Object properties-- Check Matte, set Affect alpha value to 0. Everything(Alpha) is ok if the matte object is not interlaced with any other non-matte objects in z-depth. When interlaced, vray outputs the non-matte objects's alpha(solid alpha), which is quite different from what max does. It brings me more process in post production in PS. Are there any good ideas to solve it?

percy

[marq]

set alpha contribution to -1 instead of 0, that should do it

marc

[Percy_xue]

marc,
Thanks. That helps me a lot. I'll try it.

-percy