Margus Ramst wrote in message <3A397738.F6BE17C1@peak.edu.ee>...
>Mark Wagner wrote:
>>
>> You might try replacing the cyan-tinted Rayleigh media with a true
>> wavelength-dependant Rayleigh media.  The unofficial patch for that is
>> available at http://www.geocities.com/rengaw03/povray.html.
>>
>
>Well, I've been playing around with that, but can't seem to get satisfying
>results. The best I've managed so far is a deep green/yellow horizon, using
a
>rather high IOR of 2.0 or so (with IOR around 1.1 or so I only get a mostly
blue
>-> white gradient).
>Apparently the documentation is rather scant scant and AFAIK the example
scenes
>don't create a red sunset/dawn colouration. Perhaps you could give a few
tips?


Have you tried changing the max_light parameter in global_settings?  It
really needs to be 10 or higher to keep the horizon from becoming a solid
white band.  Additionally, make sure you have assumed_gamma 1.0.  Try
changing the extinction of the wavelength-dependent media to something other
than 1.0.

And no, I don't have any specific tips for getting a sunset.

--
Mark

"The derivative of sin(2x) is cos(2x)"  - Matt Giwer
"I never said that" - Matt Giwer
"I completely agree a flywheel can store a million times more energy if its
rotational velocity is measured in microradians instead of radians." - Matt
Giwer

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