> Dear friends , Please visit link below :
> http://upload.wikimedia.org/wikipedia/commons/c/cd/CrystalGrain.jpg
>
> I am a beginner with Pov-Ray , Yet I wonder is there anyone who could help me to
> create a code which generates a photo similar to the one above ?
>
> any help is greatly appreciated
>
>
>
>

The pattern shown in that photo is very similar to what you get using 
the crackle pattern.
The example by ectire needlessly use radiosity.
Personaly, I'd just use a regular crackle and add "scalop_wave" to get 
the rounded effect. At least, as a first test. This would make an 
isosurface requiring a much lower max_gradient value and would probably 
render much faster.


Alain

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