clipka <ano### [at] anonymous org> wrote:
> There's a caveat with the latter: When it comes to the brightness of
> light sources, POV-Ray's parameterization is off by some factor of pi or
> 2*pi (can't remember which, and whether you need to multiply or divide)
> from the parameterization commonly used in papers on image synthesis.
Thank you. I knew this. It must do. This is due to POV-Ray's light source
defines the color of a diffuse surface which is illuminate by the light source
at a distance of fade_distance.
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