HEY!!! did someone say FOG?
I've been puzzling myself over that one for ages and I've come up with a few solutions! (unfortunately, none are as quite as good as "fog" fog, of course, buuuut we have to make do with what we've got)
Anyway, a super-cheap, reasonably-effective method is this:
(you may look upon this and frown, I don?t blame you, it is a bit ugly (-a bit??) but hey, give me a better way!)
Just make yourself a brush -textured WHITE all over, and slap on a good ol' func_illusionary! shape it so that you have a nice big panel, say... 1w, 512l, 512h would be nice dimensions.
Then edit these properties:
Render FX: Slow wide pulse (<-makes the fog* look like it's moving about)
Render Mode: Color
Fx amount: 100 (this just decides how "thick" your fog* is, play around here, I would recommend between 50 and 150)
FX color: 60 150 30 (good ol' "graveyard green" color )
lovely, you should now have a large, transparent panel!
now shift-drag it, and put another about 32 behind it (-or 64 if u want to speed things up). Now shift-drag that etc, etc, until u have a lovely row, back to back. Now group them, and paste them back on top of each other. Rotate this second group 90 on the Y axis, and, Volia! a cube of fog!*
OOPS! how did that tutorial get there? I dunno. It just started off as a posting...and...grew...
sorry about that, but I hope it inspires the someone out there. I'm still experimenting with fog (and other methods of creating-AHEM er, faking) Sooo if any one thinks i should actually bother to write a decide fog* tut, encompassing the use of sprites, maybe?
*The "fog" mentioned in this explanation is entirely artificial and/or fictional and it should be understood that this "fog" is in no way, in whole or in part, related to real fog.