CGtextures is another great resource that can be used in other mediums. It’s photography specifically taken in mind to be used in 3d models. The images are very accessible to artists looking for texture images to use for their works, “the textures may be used for free in 2D or 3D computer graphics, movies, printed media, computer games and 3D models. When bundled with a 3D model or scene you are allowed to sell it as a package.”I’ve used these images to create texture in a few of my illustrations. The images are very clear and crisp and ranges from anywhere from paper and paint splatters to landscapes and elephants.