The problem is that: after rendering a car in mental ray with a car paint as a shader i see the reflection on main render picture but as soon as i start to render the elements separatly i dont get the reflection i just see a black window instead of reflection (with alpha channel).
Any ideas why?
Tnx in advance!
P.S. the same is with shadow render element, specular and so on ... the only one element i can see is diffuse :'(