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Adding color to the previous example, we obtain tinted Perlin Clouds; allowing the color values to overflow past 1 gives us Perlin Plasma. A shift in coordinates reveals that the Frocessing implementation of Perlin noise is symmetric about all three axes (not necessarily implying that it’s incorrect if you stay in one octant…), producing Perlin Kaleidoscope and Perlin Oriental Rug.
Somehow the processing/frocessing implementation of Perlin noise looks a bit blocky to me. I think the reason is that they use cosine interpolation vs. the bicubic interpolation that the original implementation does.
Comment by Mario Klingemann — July 14, 2008 @ 9:32 am