Apple Motion 2 Tutorials - Manual (Page 167)

Tutorial 4 Working With Particles 167
The new gradient’s colors match the background more closely.
Although the gradient is a preset, it can be customized to better match the
background by using colors selected from the actual background.
Customizing the Gradient
Use the Gradient Editor to tailor the emitter for your specific needs.
To customize the gradient used by the particle emitter:
1 In the Cell Controls, click the disclosure triangle next to Color Over Life to display the
Gradient Editor.