Use Map Channels for Added Texture Realism

Textures add the realism of details to a material.

Overview of Map Channels
Reflectivity Map

Reflectivity maps simulate a scene reflected on the surface of a shiny object.
Transparency Map

Transparency maps create the effect of transparency and opacity.
Cutouts Map

Cutouts maps make the material partially transparent.
Self Illumination Map

Self illumination maps make portions of an object appear to glow.
Bump Map

A bump map simulates a bumpy or irregular surface.