Apple Motion 4 - Manual (Page 658)

In this example, adding the Crystallize filter creates an even more abstract effect. You
might also consider adjusting the color gradient, or applying color correction to make
the background fit more appropriately with your foreground elements.
8 Adjust the Color Range opacity gradient so the particles fade in and out rather than
popping into and out of existence.
Example 2: Creating Animated Pixie Dust
This example shows you how to create a particle system that uses two different cells to
generate a streak of particles that trails behind another animated layer. Using two cells
adds more variation to a particle system than can be achieved with a single set of cell
parameters.
To create a two-cell particle system that leaves a trail
1 Drag the first image file into the Canvas.
658 Chapter 11 Working with Particles