Vray Render Issue With Sketch-Up

[heatherrogers]

First post ever, and I am asking for help...

 

I've got a sketch-up model (and full disclosure, there are objects from 3d Warehouse in the file) that occasionally renders fine, but not always.

 

When I got to render my scene, the initial pass through (prior to the render rectangles) seems to show the desired lighting level I want, but as soon as the rectangles come up, it renders a dark scene. Its not totally black, but it appears that its not rendering my general environmental light. It does show all my modeled lights though.

 

Being the novice I am at Vray - I followed the message boards; I have under global switches, lights, default lights, hidden lights, and shadows checked. Also, under Environment, I have a GI Color Set and a value of 11.0.

 

I have included an image of my most recent render showcasing the problem. What's odd, is that just last week it rendered absolutely fine. Could it be an object within my model causing this to happen?

 

I appreciate any thoughts on this. Thanks!