Apple Motion 5.1.1 - Manual (Page 526)

Chapter 14 Particles 526
If a particle system has two or more cells, the Emitter Inspector looks much different. The list of
parameters is much shorter, and the majority of the cell parameters are replaced with a smaller
group of Master Controls (hidden by default).
Changes made using the Master Controls modify the effect of each cell’s parameters relative
to the other cells in the system. This means that for a particle system with three cells that have
different Scale values, increasing the Scale parameter in the Emitter Inspector multiplies the
Scale value of all three cells by the same percentage. This has the result of increasing or reducing
the size of every particle in the system, while keeping the size of each particle relative to one
another the same. For this reason, the Master Controls parameters of multi-cell particle systems
appear as percentages.
Emitter parameters
The parameters in the Emitter Controls group of the Emitter Inspector determine how particles
are distributed and rendered in your project.
Several of these controls are identical to those found in the Emitter HUD, with one difference:
Although the emission control in the Emitter HUD lets you manipulate the Range, Angle,
Latitude (3D), Longitude (3D), and Speed parameters using a single, graphical control, the Emitter
Inspector uses individual controls for each parameter.
Note: The emitter parameters in the Properties and Emitter Inspectors can be keyframed
to change values over time. However, there is no way to control the animation of
individual particles.
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