What implementation of Perlin noise does Povray use?
Docs say noise_generator type 3 is Perlin noise...
I'm asking because I stumbled on paper by Perlin (SIGGRAPH 2002 p.681),
describing some ameliorations to the noise algorithm and I was wondering if
these has found their way in Pov code.
Anyone interested, mail me to get a pdf of the paper.
-- Alex
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