This page exists within the Old ArtZone Wiki section of this site. Read the information presented on the linked page to better understand the significance of this fact.
The Bump channel controls the surface roughness, giving the surface the illusion of being bumpy. Bump channels only affect surface normals, i.e., the geometry that faces the camera. As a result, the edges of the surface still appear smooth despite having bump applied. The amount of bumpiness is controlled by an image map that is usually grayscale.
You have the following options when working with this channel:
TIP! While it is possible to use minimum and maximum bump at the same time and can be useful when finessing a bump impression into an object, if the numbers are equal, they will cancel each other out.