Nekar wrote:
> Is it possible with Pov-Ray to simulate a moonlit scene realisticly? The 
> moon  should reflect the sun's light on earth with resulting shadows on 
> earth.
> 
> 
Nekar, I'm no lighting expert, but from what I have observed, the moon 
produces sharp edged shadows like the sun (although the contrast is low 
because the light is so dim).  The remaining light is that blue light 
you get scattered from the atmosphere.  My suggestion would be to use a 
dim point light aligned with the position of the moon and a dark blue 
sky_sphere with radiosity.

If you are trying to render a space scene, however, I would put a point 
light inside the moon and use light groups to control the illumination 
of the scene.  The sun would illuminate the moon, but the point light 
inside would be the actual light emitter from the moon.

The most realistic approach would be using radiosity with probably set 
texture finishes for the moon/sun/earth.  Then the light from the moon 
would actually be reflected from the sun.  But computing pure radiosity 
from such widely spaced points sounds like its asking for trouble.

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