"Abe" <bul### [at] taconicnet> wrote in message
news:4093f62d@news.povray.org...
> Dave VanHorn wrote:
>
> > I'd like to set in some clouds, at a realistic altitude.
> > I'd like to have them as a sphere of some sort, around the planet, so
that
> > they cast shadows on the ground, and that they don't look like cardboard
> > cutouts from underneath.
> >
> > http://www.f-lohmueller.de/pov_tut/backgrnd/p_sky2.htm
> > This looks good to me, but I can't see how to translate it to my world.
>
> My understanding is that this presentation is based on planar cloud
> layers. Substituting concentric spheres for the planes should make it
> work for you. Note though that in doing so you lose the availability of
> the third dimension of the texture for the time variable in animation.

Hmm.. I would have thought I could maybe map the layers onto spheres or some
such..
In this project, I'll start out below them, and end up going above them, so
in the end, I would like to create 3D clouds that are not just layers of
planes.

> I might also suggest reviewing the following:
>
> http://3dgallery.dhs.org/tutorials/3d_clouds.html
>
> http://www.oyonale.com/ressources/english/sources13.htm

Thanks, this is giving me some ideas.


> This discussion should probably continue in one of the text groups.

Cool

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