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). The
reason it is still visible is that it is many times brighter than the
surrounding objects.

I think if POV-Ray showed light intensities based on for example an
logarithmic function rather than linearly it would be possible to make more
realistic scenes, and it would be easier too. I think it would affect more
things than you would think; perhaps completely change the way we think of
colors in POV-Ray.

Rune
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