Nerd3d.com has a tutorial on that.  I believe it uses his P4 fog prop.  Dunno if it would work in P6.

Thanks, I'll check it out.  I'm assuming you're talking about the Fog Tool Delux III which should work (don't see why it wouldn't).  I was looking at a few screenshots, and it looks like it might do the trick.  If not, it's only $12.95, and I'm sure I can find many other uses for it!

the light type you mean is called "volumetric lighting" which i don't think you can do with the p4 renderer!

Volumetric Lighting... wow, do I feel like a total moron.  I've always known that, but for some reason I had a major brain seizure and couldn't come up with a term.  Must be my 3D Modeling class...

Anyway, I know it can't be done with the P4 renderer, which is why I want to "fake" the effect -- as in using props to create fairly close results without resorting to the Firefly renderer.

If anyone else has any pointers, please let me know.