Fog for a waterfall

I have a waterfall i am putting in an area in my game and I want to do fog around the waterfall in a specific location, is there any good ways to do that?

Rob

I guess a better way to put this is that i want fog relative to a point rather than relative to the camera. Certainly theres times where you want this, for example entering a graveyard that was foggy. The closer you got to the grave yard the more of the fog you would want to see.....

Do it with a particle system. Where your particles are made up of hazy cloud sprites, that use the alpha channel. A search of the site should turn up more info on particle systems.