What is bump mapping?
Bump mapping is an additional channel (height map) provided to an image generator or rendering engine which gives the object an appearance of a bumpy surface as the shading changes with illumination changes. Higher luminance variation will increase the effect. However, bump maps have no effect on the shape of the geometry. Some 3D rendering applications, such as 3D Studio Max, can change geometry with displacement maps, and our tools support displacement mapping as well.
