Creating a Cold Air Effect

I'm creating a morgue for a map I'm designing and I'd like to have a
"cold air" effect come from vents near the floor and swirl about a bit
before disappearing... like when you open the freezer. Does anyone have
any suggestions on creating this in a realistic way? I've tried using
the fog entity but I don't seem to be able to get it quite right.

I've also tried the volumetric smoke entity but all I get are big purple and black squares rotating on my map.

Any pointers or creeative solutions would be much appreciated.

Cheers

I have also put a pair of chiller fans on my map and used the steam entity to create a 'cold air cloud' that looks just like cold air being blown, but I have the problem of it turning black once the real lighting is setup. If you can get round that then steam is the answer!

I got some interesting effects with the steam entity too but it was
black in my map too. Gonna try experimenting with it some more to see
if I can get it to work properly.

cant you change its colour?

it goes black even when the colour is white. Im thinking it has something to do with shadows but im not sure.

I'm sure theres a few entities that can do this. THeres an env_smoke entity that makes white smoke sprites by default, but I believe they all move around in random directions. Theres an env_smokestack entity which has settable directions and stuff and it affected by wind, all you'd need to do is scale down the sprite size.

In order to "force" an env_steam entity (and probably other particle
based entities, I haven't checked), use the "emissive" flag. By using
this the particles will be the colour you specified, regardless of the
lighting in the area.

---

[img]http://card.mygamercard.net/sig/Default/reno84.png[/img]
Designer @ Haiku Interactive | ReNo-vation.net

You can use either the "Emissive" flag or an env_particlelight entity (which lights up particles)

Oooh hadn't noticed that entity, thanks for the heads up.

---

[img]http://card.mygamercard.net/sig/Default/reno84.png[/img]
Designer @ Haiku Interactive | ReNo-vation.net