ShareTextures allows you to download 3D models and textures for free with no limit on the number of copies, and all materials are CC0 licensed, so you can use them freely.

Texture mapping is the technique of wrapping a 2D image, called a texture, around a 3D model, called a mesh. The texture image can be a photograph, a painting, a drawing, or any other digital image.

We’ve seen a few different ways to add textures to 3D prints, including using Blender to modify model surfaces. Textures can enhance the look of a model, and are also a good way to hide layer lines.