Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0)

You may:
✔ Use this shader in personal projects.
✔ Include it in public or private modpacks.
✔ Share it unmodified, with proper credit.

You may not:
✘ Modify or alter the code in any way.
✘ Distribute modified versions.

License text: https://creativecommons.org/licenses/by-nd/4.0/