Problem with light - black windows

I am a total beginner in V-Ray.
I have a problem with black windows.
what’s the problem?

Re: Problem with light - black windows

Make sure you tick the “GI” and “Background” boxes under “Environment” options tab.
The default render settings should have those ticked already.

Re: Problem with light - black windows

You have the rectangular light in the wrong direction. We don’t support reverse face to change the direction of the light anymore. You have to rotate the lights. This is exactly the same issue that adesiguala had in the video tutorial.

Best