When I am done with some shift and blow with the wind fog that looks great and does drop the FPS significantly, we will post some screenshots of it in the level. Unfornately, what I thought would take a couple hours tops to accomplish has turned into an obsession for about 4 days straight now. The perfect fog without a large FPS drop with everything we have going on, plus the shaders, and the high poly-count isn't nearly as easy as I thought it would be. I really want to keep the FPS in the 60ish range.

I will not surrender to the fog! We will prevail!
News at 5,
TheLocoKid

EDIT: Finally! Success is near!