Most materials can be colorized dynamically.
The colorization algorithm is simplistic and works best for material images which have a limited hue range. To colorize a material, the renderer simply subtracts the
bgc= value and adds the
color= value to each pixel value.
Colorization is disabled if
color= is not specified. The
bgc= attribute is ignored by cabinet materials; the base color value embedded in the vnc file is used instead.