John VanSickle wrote:
> 
> Rune wrote:
> >
> > To create fire that looks realistic in POV-Ray the usual approach is
> > to use both emitting and absorbing media. Absorbing media is used to
> > make the fire visible on bright backgrounds.
> >
> > But I think in reality fire doesn't absorb light (almost not anyway).
> 
> Hot gases *do* absorb light; in fact, they absorb at the exact same
> frequencies at which they emit.  This is how astronomers can tell
> which gases comprise the sun's corona, various nebulae, etc.

	The moral of which is that - by default, and unless you _know_why_ you
want to do something else - you should set your emission and absorbtion
to be the same in any glowing media.  It will almost always look better.

	-Robert Dawson

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