"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> "Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> schreef in bericht
 I'll render one with only the atmosphere
> > at
> > different elevations to illustrate.
> >
>
> I am really impressed. I wait impatiently for further developments along
> these lines. I sure am interested!
>
> Thomas

Thanks for encouragements.

Here is an illustration for atmosphere, considering pure atmosphere. The only
changing parameter is the elevation of the sun (simple looks_like white sphere
at the moment).

You can obtain different colors (including reddening/decay) by tweaking some
parameters like the color of the scattered blue (rgb <0.25, 0.65, 1> here), the
power of the sun, and parameters controlling the density function (basically:
exp(-k*h/T), k=mult.factor, h=height at the given point, T=constant thickness
of atmo). You can also add absorption, but I prefer leave that to cloud layers.

The camera is at 2m above the ground. When you put it higher, you get a deeper
blue automatically because there is less gaz above you: the blue is less
scattered and the blackness of deep space contibutes more.

    Bruno.

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