Mark Wagner <mar### [at] gtenet> wrote...
>
> Andre wrote in message <3900e470@news.povray.org>...
> >what about beign able to give the ior a denstity?  it would be really
good
> >for rising steam...
> >what I have in mind is pretty much like the density we have for density
> >nowadays, but for IOR.  I have no knowledge of programming, so I dont
know
> >if i'm asking to  much.
>
>
> I've been thinking about how to implement this, and the best solution I've
> come up with so far would render far too slowly to be worthwhile (render
> times of months to years at best).
>

It wouldn't have to be that bad, but it would be rather slow (probably on
the same lines as scattering media... maybe a bit slower).  The easiest
solution would involve ray marching, the way media works.

-Nathan

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