Not only can textures affect the color of a material, they can also affect many of the other properties of a material. The different aspects of a material that a texture influences are controlled in the Map To panel.
As an alternative to using the Texture Channels, Blender includes a node-based texture generation system which enables you to create textures by combining colors, patterns and other textures in much the same way that you combine Material Nodes.
How to bake a texture to its UV-mapped texture. This can be used to emulate the effects of lightening, texturing and other effects to make your object look as it dose in a render inside blenders game engine. These UV textures can also be exported with the model and be used in 3d games made with other applications as well.