I see that Worlds of War, WarHammer and othe rhigh grade blizzard and Blur studio animation always have subtle hints of it.
Do you think they render inside the 3d app or use the compositing program tools and plugins.
Also look at Prince of Persia 2 trailer with the hero fightingon the boar deck.
Layers of fog....
in the 3d app (separtae pass and then composite) or totally generated in the 2d app?
---- any great titorials on compositng layers of particles ----