Don't know how I missed https://ambientcg.com so far, which is an interesting collection of CC0-licensed textures.

#GameDev

ambientCG - Free Textures, HDRIs and Models

Free 3D Assets Never Looked This Good! Get 2000+ PBR Materials, HDRIs and more for free under the CC0 Public Domain license.

Julio Sillet 3D Art

Making Free 3d and Blender content for everyone. You can support me on Patreon and get access to my 480+ Textures! https://www.patreon.com/c/Sillet Or you can buy me a coffee ko-fi.com/sillet3dart

@landelare thanks! didn't know the first one, added to my list 🙂