I’ve gone through and uploaded a bunch of “natural” textures. Rocks, walls, brick, grass, sky, metal, paint and much more. These textures are available in 3 sizes (1MP lo-res, 4MP hi-res and original) and can be purchased for personal or commercial use. Hope you find something you can use!

Texture available at pixelens.com

Textures available in the Digital Download Textures Gallery.