In article <3d91ec57$1@news.povray.org>,
 "Tim Nikias" <tim### [at] gmxde> wrote:

> I suspect the scattering media is set incorrectly... Try that,
> and then fiddle with the rest. It often happens to me that the
> image gets darker when using scattering media, sometimes
> setting extinction lower helps.

With transparent, refracting objects, this would make sense. Without 
photons, POV lets light go straight through objects, only simulating 
attenuation. With photons, the light can be refracted completely away 
from some areas, concentrating in others, making parts of the image 
darker.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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