Clouds are using Fractal Brownian Motion and Raymarching prarallax offset method:
Find the manifest.json file in the Packages folder of your project and add a line to dependencies
field:
"com.alexmalyutindev.fbm-parallax-clouds": "https://github.com/alexmalyutindev/unity-fbm-clouds.git#latest"
Or, you can add this package using PackageManager Add package from git URL
option:
https://github.com/alexmalyutindev/unity-fbm-clouds.git#latest
This project is MIT License - see the LICENSE file for details