Christoph Hormann wrote:
> 
> Seems you are right, but the effect is not very strong.  I think simple bump
> maps probably are not sufficient in many cases like this:
> 
> http://www.wolkenatlas.de/wolken/wo12625.htm

An understatement.

> 
> Of course these are somewhat extreme, but the general type of those clouds is
> very common.

...and very desirable ;)

Abe

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