OpenSimplex noise

OpenSimplex noise is an n-dimensional (up to 4D) gradient noise function that was developed in order to overcome the patent-related issues surrounding simplex noise, while likewise avoiding the visually-significant directional artifacts characteristic of Perlin noise.

The algorithm shares numerous similarities with simplex noise, but has two primary differences: OpenSimplex has a variant called "SuperSimplex" (or OpenSimplex2S), which is visually smoother.

"OpenSimplex2F" is identical to the original SuperSimplex.

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