PerryLight uses one 64x64 RGB blue-noise texture generated by Christoph
Peters' void-and-cluster database:

https://momentsingraphics.de/BlueNoise.html
https://github.com/MomentsInGraphics/BlueNoise

The database and generator are dedicated to the public domain under CC0 1.0:
https://creativecommons.org/publicdomain/zero/1.0/
