Sven Littkowski wrote:
> Greetings.
> 
> Who knows how to make with POV-Ray a cloudy planet surface and thin 
> atmosphere similar to that of the photo? I am in big need of a macro which 
> can do surfaces of planets (spheres). Who can help?
> 
> Sven 
> 
> 
> 
there is not really a readymade solution that can be just handed to you

there have been at least two investigations that I can remember into the 
idea of creating an all in one macro or technique for the rendering of 
an encompassing atmostphere that would produce both sunset and high noon 
effects from the planet surface, and space shot effects too.  Searching 
the images group might turn those up, though they might be more purist 
than you need.  But it is something that POV-Ray should be capable of.

more pragmatically there is a nice summary of cloud techniques by Gilles 
Tran at the bottom of his page
http://www.oyonale.com/ressources/english/sources13.htm
though again his context is more specifically landscapes from the planet 
surface

you already know about Christoph Hormann's work and so probably have 
read that he may be looking into the problem of creating such effects as 
a possible future elaboration of his project

so we are all awaiting with interest the ingenuity that you may bring to 
this ;)

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