Hi DLM,

I might have a slightly different idea which I still need to test.

My idea is not to have yellowish ambient lights, but to replace the yellow 
areas in that texture with their corresponding areas of the land texture. 
The result is now a texture which features just tiny fractions of the land. 
I still keep an ambient value.

This way I hope to achieve that on the dayside the lights are not 
recognizable, but on the nightside you can see the areas which glow. Despite 
of using the underground colors, it still should look like lights.

I am making now some test renders and will post them here, as well.

Later,

Sven




"dlm" <me### [at] addressinvalid> schrieb im Newsbeitrag 
news:447b5cfc$1@news.povray.org...
> Sven,
> So the real question is: Who left the lights on in China?
> The trouble is that Earth_Surface is just a sphere with merged textures 
> for lights and terrain.
> You would need to limit EarthLights to a hemisphere coaxial with the 
> earth - sun (lightsource) axis, then generate the composite
> I have no idea how.
> D
>

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