The GLSL Core Tutorial has a new section for image texturing. Images are commonly used as wallpaper applied to 3D shapes to create a variety of effects. In this section we focus on the OpenGL and GLSL typical scenario of texture usage, and explore a few new GLSL functions, such as
Jason L. McKesson has completed a new section on his online book. This section covers Texturing.
The blog Lost in the Triangles has an interesting article on appropriate texture dimensions. The discussion that follows is also worth reading.
Spiral Blog: Paper World Texture Set.
An unusual texture set that allows you to create scenes that look like they’ve been mocked up from arts and crafts materials.