On 2022-03-24 (-4) 00:27, Cousin Ricky wrote:
> 
> Alas, I do not have a simple explanation for how this works; I don't
> completely understand it myself.  I just examined test_lightsys.pov, and
> used the technique on a solar spectrum to get my light_source colors.
> Lightsys IV can do white point adjustments without requiring a spectal
> curve, but I haven't figured out how to do that yet.  Have a look at
> scenes im_test_day.pov and im_test_inc.pov to see if that helps.

Oops, I mistook the image map filenames for the scene filename.  The
scene description file is demo_image_map.pov, in the demos subdirectory
of Lightsys IV.

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