Having said everything about Textures in Blender in the previous tutorials, many people find it still hard to grasp the concepts behind the texturing system and applying textures.
Up to this point, we have only talked about half of UV Textures; the UV map and layout. The layout is the arrangement of all the UV maps. Each UV map 'maps' image pixels to a mesh face. There is one UV map for each seam or sub-mesh. The entire layout is colored by an image. Blender provides several features that help you when working with the image part of the UV Texture. Blender also includes a built-in texture painting program. This tutorial discusses how to use images effectively.