Re: Stacked glass material
You’re most welcome Per, glad we could help.
fog color - vray apparently doesn’t calculate fog color unless the entire object is the same material. If you use a mapped material for one side, and a smooth one for the other, vray doesn’t consider the volume closed, therefore has no volume to calculate fog. That’s why the box map is so useful, it is one material for vray’s purposes.
That’s the best I understand it, if others have a better explanation, or if it happens a different way, I would be curious to know.