Margus Ramst <mar### [at] peakeduee> wrote in message news:370f8245.0@news.povray.org...
> Hmm, these settings _should_ give a rather smooth media. I think min_samples
> could be dropped quite a bit, actually. You could try lowering variance to
> 1/256. Sometimes (I'm not sure, under what conditions) media looks very
> grainy when the light_source is nearly anti-parallel to the camera. Have you
> tried some mega-high sampling rate and does that solve the problem?
> Like Ken suggests, the extinction should be lowered for fog (or any media
> whose particles have a high albedo); 0.1 seems a bit extreme, though.
> Dunno...

Well, I'm far from expert in these matters, but to get a light fog type effect, I use
the
following:

{
intervals 40
samples 5, 15
scattering { 1, 0.05 extinction 0}
}

leaving all other settings at their defaults. I find that using anything other than
extinction 0 ( in an uncontained media ) doesn't allow the background / sky_sphere etc
to
show.

But then again, what do I know? ;-)

----------------------
Andy
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