>I want write a GPL python class (mainly to use it in Blender) to
>write a Pov code to make a realistic-physical correct light simulation.

>Can I use your formula?

Of course. I forgot to say.. fade_distance formula works only with flat
light sources.. For omnidirectional light you should set fade_distace to
light source radius.

>Have you a site? Can you explain more?

No, I dont have site. fade_distance formula is derived from circle area.. I
try to explain fade_power formula and give you example code when I have
more time.

Matti

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