5) Radiosity

The hand-written notes in the handout contain all of the information
for this part of the course.

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Exercises
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<LI>Explain what lighting effects radiosity is trying to model that
are <I>not</I> modelled by <B>RT</B> or <B>PSC</B>.

<LI>Describe the basic radiosity algorithm.

<LI>[1999/9/4] (d) Explain what a form factor is, in radiosity.
  Outline an implementable method of calculating form factors.

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