"Lothar Esser" <ess### [at] chopswmededu> wrote in message
news:39036D18.3391859B@chop.swmed.edu...
|
| Do you mean the colors on the surface ? The surface consists of individual triangles
| (14492) and was generated by a molecular graphics program GRASP. The colors on the
| surface outline the contributions of certain types of atoms to the surface. i.e.
| white surface area = CB atoms etc.

I see.  That's a great effect done in a way I wouldn't have thought possible.
Back to the sky, there's the tiling include file which could probably do a continuous
motion which loops.  Just make the clouds using that on a plane and translate
across once.  The only difficult part would be scaling it right for the view and
that really shouldn't be much of a problem.
In case you don't know of it yet:
http://www.geocities.com/ccolefax/tilegen.html

Bob

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