is a nice site that distributes free textures (4k, 8k, PBR) for gamedev or other uses:
Texture Haven is a website where you can find high quality scanned textures for free, no catch. All textures here are CC0 (public domain). No paywalls, accounts or email spam. Just download what you want, and use it for every purpose. Texture license
- You can use the textures for any purpose, including commercial work.
- You do not need to give credit or attribution when using them (although it is appreciated).
- You can redistribute them, share them around, include them when sharing your own work, or in a product you sell.