The beauty of doing this procedurally is that if the geometry were
hand animated, the expressions would automatically pick up any
new animation and update the effect accordingly. Finally, we will
write a custom Z-depth pass for the particle systems using some
more expressions and locators.
Thanks to Shiv Dholakia for the initial draft of this section.
8.2.2 Outline
1. Scene setup summary
2. Creating the particle systems
3. Setting up the expressions
4. Setting up the customized Z-depth pass for compositing
5. Particle disk cache
MEL and Expressions
Chapter 8
Figure 8-5

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