The reflectance method: " ambient ", " diffuse ", " specular ", or " none ".
The reflectance method for the light source model is set to method for the active visualization window. The reflectance method determines the visual appearance of reflected light.
ambient adds reflected light from everywhere. It provides a kind of "background light".
diffuse provides a matte or "dull" finish. This is a good method for objects which have a dull surface. When an object uses this method, it is scattering light equally in all directions.
specular produces a highlight on the object. This is a good method for shiny objects. When an object uses this method, light is reflected where the angle of incidence equals the angle of reflection, and this produces the highlight.
none ignores the reflectance method, or turns off a previously selected method.