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Here is a very simple start:
camera {location<0,.1,0> look_at<0,0,10000>}
light_source{<0,1000,0> rgb<1,1,1>}
file://earth
sphere {<0,0,0>, 1000 pigment{rgb<.35,.35,0>} translate <0,-1000,0>}
file://sky
sphere {<0,0,0>, 100000 pigment{rgbf<.8,.8,.8,.25>} hollow}
--
Mike
wk: mik### [at] pyxis com www.pyxis.com
hm: mwe### [at] sciti com www.geocities.com/mikepweber
"Ammar" <a.a### [at] uea ac uk> wrote in message
news:38fcb58c$1@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] uea ac uk
>
>
>
>
>
>
>
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