Perlin noise

After its developer, Ken Perlin.

Perlin noise (uncountable)

1. (computer graphics) Random-looking visual noise generated by a function, widely used in computer graphics to simulate effects such as fire and clouds.
   • 2022, Gabrielle Zevin, Tomorrow, and Tomorrow, and Tomorrow, Vintage (2023), page 476:

     “And it needs more texture. A bit of Perlin noise. It should look a little rougher, otherwise it doesn’t seem real.”