i beleive there is either a flag or a setting on env_steam that says heat or normal. i think it is a setting. if you put that to heat it might get you what you want. also you can choose visibility, spread, speed, and number of particles to get a slower moving, more spread out or whatever you may want sort of effect. :thumbs: hope that helps.
Right, I don't know but... Shouldn't steam be changable in color.. etc?
I do suggest env_smokestack though, it can be made to look like steam, I guess, and it blocks visability. Question is how good performance you need, if it's a seculded area or not.