Material Download Sites
Free PBR Textures
These websites host free [libre] PBR textures. In order to utilize these textures in Source, some processing is needed.
These websites host mainly traditional textures, which can be utilized in Source without much processing. Check for limitations (e.g. no commercial use) before using them!
- Textures.com (formerly CG Textures)
- Spiral Graphics
- ModDB texture packs
- Gaming-Models (VTF)
- TopHATTWaffle's (VTF)
- David Gurrea's
- Wikimedia Commons - large library of various images.
- Gamebanana (Recommendation: search textures in the Source Engine and Gamebanana sections)