Kari Kivisalo wrote:
> 
> Source in bin.source
> 
> Not to my surprise MP produced good images when supplied with physically
> correct data. Sun color temp. 5400K. Sky color temp. 15000K to 18000K.
> Sun/sky energy ratio 9 for clear sky. Notice the gamma 1.0 again.
> Image white point 6500K, gamma 2.2.
> 
> Because pov doesn't support compression of dynamic range I used slightly
> lower diffuse values to prevent burning.
> 

looks quite good but it is a bit simplified.  If there is *no* dust in the
atmosphere, the color of the sky depends on the angle to the sun.  In fact there
is alway some dust and therefore the sky's color (temperature) is a function of
the angle to the sun and horizon.  Furthermore the sun's own color is also
influenced by dust. 

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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