perlin2d is used at run time in 7 crates (of which 2 optionally). It is a direct run-time dependency in 1 crate. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) perlin2d version
500 6 photon-rs ^0.2.6
170 wave-function-collapse dev ^0.2.6