GLSL Core Tutorial – Texturing with Images plus Querying

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 textureSize, textureQueryLod, and textureQueryLevels.