I think you just have to adjust a few things to do this. If you look in the sticky covering materials, there is a thread in there about making fog. BB shows how to do something like in that render. Close up or a grand scale, the materials setup would be the same, you just have to make adjustments for the size. I will experiment with this tonight and see if there is a way to post my results using a CD-RW...

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.