in news:web.3dc3cfbec87668a667ebf1b60@news.povray.org davidafisher wrote:

> It works fine except as soon as the center of the light source hits the
> horizon (given by Al, - Altitude)the whole light source and sun disk
> disappear!
> 

David,

Do you use a plane in your scene, if so once the sun is at the same hight 
the lightsource will dissapear. Replace your plane with a big translated 
sphere to simnulate planet curvature.

Also I tried your scene snippet, but, with watever date or time, all I get 
to see is blue sky everywhere. Could you post a more complete scene, with 
a date/time where it looks good and a dat/time where it goes wrong, in one 
of the scenefile groups.

Ingo

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