Hi Nico!

> "volumetric" clouds. Any idea ?
Scattering media could be a way to achieve nice realistic looking 
clouds. Perhaps you could have a look at Gille's MakeCloud macro which 
you can find at http://www.oyonale.com/ressources/english/sources13.htm

Another nice example is Tim Nikias' "Worldbowl": 
http://news.povray.org/povray.binaries.images/30620/

HTH,
Florian
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#local a=-5;#while(a<5)sphere{<sin(a*pi)*5a*10pow(a,5)*.01>sin(a*a*a*
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<8,-3,-8>*10}// [www.povray.org]     [www.imp.org]     [www.irtc.org]

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