Wow, that is some nice ice there!
Would you mind if I tried integrating that into the texture, as a "high 
quality" option? (proper attribution would be provided, of course)

Though I doubt it would be practical to render a large scene, or a lot of 
trees covered in snow/ice with those settings...

ian

"Mike Hough" <nos### [at] nospamcom> wrote in message 
news:499bd031@news.povray.org...
> Nice snownut. Here is something you could try for the ice. It mainly the 
> photons and dispersion that give it sparkle.
>
> material {
> pigment {color rgbt <1, 1, 1, .9>}
> finish {phong .4 phong_size 30 reflection .05}
> interior {ior 1.33 dispersion 1.1 dispersion_samples 20
> media {
> emission .1
> samples 1, 2
> density {
> bumps
> color_map {
> [0 color rgb <0, 0, 0>]
> [1 color rgb <0, .3, .3>]
> }
> scale 3
> }
> }
> }
> }
>
> photons {
> target
> refraction on
> reflection on
> }
>
>

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