I was thinking of a way to do a kind of realtime fire and i came up with this:
http://mysite.reblended.com/pooba/blender/Demos/fire.blend
It uses size, alpha, and color ipos to make a sort of fire.
Pooba
Link no work
Er, yeah it does. It didn’t work when i first posted it, but that was just because it said mysite…reblended. It’s fixed now.
Pooba
Looks pretty good. I must say Doc Holiday’s looks more realistic though…
Make the base a little less red and it might work better.
Doesn’t look bad…but I think some sort of texture would help to improve the fire a lot… 
Looks great Pooba. Dont get caught up into realistic fire. There are those who will do that. Do what YOU do and add to the body of research that helps ALL of us.
I updated with a texture and it looks a LOT better. Thanks to MNME for the texture.
I also made the added flame a bit more random.
http://mysite.reblended.com/pooba/blender/Demos/fire2.blend
Tell me what you think.
Pooba
not bad… but i think doc holidays is better
it is less demanding on cpus and looks a bit better… u should check his site out.