This shader library provides a collection of shaders that implement caustics, global illumination and other functions that support physical correctness.
Before any shader in the physics shader library can be used, it must be
attached to the mental ray rendering software using a statement link "physics.so", and the shaders must be declared with the statement
$include <physics.mi>. Declarations are given in mi format, as
described in chapter on page
. Here is the
summary: