BuRnInG_IcE nous apporta ses lumieres en ce 31-01-2007 20:52:
> I have this screen name on many different web site, and since I use POV-Ray,
> I thought "Hey! I'll make an avater in POV-Ray!"

> My ire is this: I can not find a good ice . . .
> texture/interior/normal/what-have-you. I know the ice IOR, but it still
> looks like glass, because it is so smooth. A texture doesn't help, nor do
> normals. I can't understand exactly what to do. I was hoping someone might
> know where source for good ice might be. Specifically, I'm looking for a
> natural, sorta frosty, ripply looking ice, not a ice cube look. But right
> now, I'm not picky. Any ice would work, and I could just fiddle with it.

> P.S. I got the flame worked out. Just need ice.
Natural ice often have air bubbles or other inclusions. Make them by using 
several small spheres with the ior of air (1) placed inside your ice. Add some 
opaque and dark bits "floating" inside. Differencing them can be very slow, 
beter use an union. Another way (not tested), wrap them in a merge and diference 
that from your block: may be faster for you then have only one bounding box.
Layer some whitish, partly transparent, pattern over your ice texture. Give the 
white part a strong normal scaled small. granite may be a good start.
Add some dispersion.
If it's not the case now, try using an iso-surface. Carve some grooves in it by 
adding some bump function, unevenly scaled.

-- 
Alain
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Don't try so hard, the best things come when you least expect them to.

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