non homogeneous fog

[maru]

Yes, there is a way to do this - just use 3ds Max native environment effects (fog, volumetric fog). It can be used to produce really nice results.

I always thought that native enviroment effects does the same thing as Corona's volumetrics. Is there substantial difference in their behaviour? Might be worth to give it a try.

As pokoy and mraw said, it is just a post effect, and it does not get any shading. But it can be sometimes used to create nice aerial perspective.