So there's a way to make it flat, low to the ground, what about getting it up into the air... say like... a smokey room in the DH Retreat without dropping the retreat to ground level.

That's part of what was causing me confusion on how to make the atmosphere work, because the scene I was experimenting with was using the retreat and I hadn't dropped the retreat's floor to ground level, because I wanted the impression of height through the windows. I'd create the smokey room atmosphere, then render and not see any smoke haze.

Sunfire's Creations