ok, this *might* help you:

create a plane.
that will be the ground

then add a constant fog the the scene (that will be the atmosphere)
make the distance something like 100,000
make it blue (or whatever)

create a ground fog
color it white
make the distance less the the other fog

this is by no means physically accurate, but it's how I do it.  If you need
more help post a reply or mail me at and### [at] usanet

Good luck
Andre

P.S. if you really need the spheres set up, I'll be glad to help you (I'll
just have to think about that for a while...)







"Ammar" <a.a### [at] ueaacuk> wrote in message
news:38f311a4@news.povray.org...
> Hello All
>
> I am currently working on a project to render skies using physically
> accurate or t least approximate colours and intensities. I have been
advised
> to use POV-Ray simply because it is a very good ray tracing program. My
> knowledge of the language is very bad and I am struggling to use it.
> I have gathered all the equations to implement my model, but I am
completely
> clueless as to how POV-Ray works. I would be very greatful if anyone could
> provide with a skeleton program that would setup the scene for me. That
is,
> create the earth and sky spheres and postion the view on the surface of
the
> earth looking at the sky.
>
> Then I can use that to change the colour of the sky based on equation I
> have.
>
> I would like to apologise for this, but my POV-Ray knowledge is very bad
and
> I am starting to panic !!!
>
> Any help would be greatly appreciated.
>
> Please feel free to reply to me on the email address listed below.
>
> Thanks..
>
> Ammar
>
> a.a### [at] ueaacuk
>
>
>
>
>

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