...On a ideal diffuse reflector : a very rough surface.First, we will consider a particular type of surface
called an ideal diffuse reflector. An ideal diffuse surface is, at
the microscopic level, a very rough surface. Because of the microscopic variations in the surface, an incoming ray of light is equally likely to be reflected in any direction over the hemisphere. |
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Diffuse reflections are constant over each surface in a scene, independent of the viewing direction.