Hello,
I have been researching this issue for a few days now, and have tried several solutions.
When I render my Sketchup model with Vray, only the windows are rendered.
I have placed everything on the 0 Layer, un-grouped everything, and copied and pasted the model into a new Sketchup file. The last technique works, but only once or twice, after which, it simply renders only the sky, and NONE of the model.

I hope someone has another solution!

Thank you-

Sketchup 8
Vray 2.0
Windows 7