# Third-Party Notices

## 2D Simplex Noise

`math.simplex_noise` and `cultmath_simplex_noise` port the textureless 2D
simplex-noise function by Ian McEwan and Ashima Arts, as distributed by Stefan
Gustavson's `webgl-noise` project and Unity Mathematics.

- Copyright 2011 Ashima Arts.
- Upstream: <https://github.com/ashima/webgl-noise>
- License: MIT.