[Here is a PDF version for readers whose browser does not understand MathML.] The Simplex Noise (or Improved Perlin Noise) algorithm uses a somewhat mysterious “skew factor” of 3–1 2 . I did not find any really satisfactory explanation for this factor in the descriptions of Simplex Noise that I read. But I managed to… Continue reading Understanding skew factors in Simplex/Improved Perlin Noise