Materials not showing

[Cma4]

Hello,

I'm working with Vray for Rhino 3.0 and I've applied .vismat materials through in library. The materials all show correctly in the screen view. When I go to render only one material is showing up and it is transparent in some areas, when it is programmed as an opaque material. What can I do to fix this problem? I've attached what I am seeing on screen.

[palosanto]

Hello,

I'm working with Vray for Rhino 3.0 and I've applied .vismat materials through in library. The materials all show correctly in the screen view. When I go to render only one material is showing up and it is transparent in some areas, when it is programmed as an opaque material. What can I do to fix this problem? I've attached what I am seeing on screen.

At first glance it seems more like a lighting problem. Can you share the scene?