Ambient Occlusion

[glorybound]

I usually put a dirt map into an extra texture material, and it works well. But, I have always wanted to know; how can I not apply it to glass? Or, even better, have the effect apply to element behind the glass (example: shower door).

[Pixelcon]

There's an exclude objects rollout in the VrayDirt map.

[Undersky]

Also, there's the "Work with transparency" checkbox.

[glorybound]

I guess I knew about the exclude; I wasn't thinking. I'll check out the "work with transparency".