overlapping polygons

[laraclemente8@gmail.com]

Hi guys,
I'm looking for a way to make the ambient occlusion behaves similar to the vray dirt map. I would need to be able to see overlapping polygons in the render passes.
any suggestion?
Thanks for your help
cheers

[GeorgeK]

Can you please give a more detailed example and preferred end-result of what you are trying to achieve?