Here is a little picture done with Vray for Maya 2011 and Nuke 6.1. The goal was to do this without any photoshop post-process.
All passes were rendered with Vray and the picture is composited with Nuke 6.1.
Passes rendered : Diffuse, rawGI, directLighting, specular, rawReflection, ReflectionFilter, rawRefraction, RefractionFilter, AO, Zdepth, PointPass, NormalPass, IDpass
Passes rendered :