Apple Motion 2 Tutorials - Manual (Page 184)

184 Tutorial 4 Working With Particles
A single butterfly flaps its wings in the center of the Canvas, then disappears. A quick
glance at the mini-Timeline shows the object’s duration.
5 Stop playback, then move the playhead to frame 30.
6 Save your project (press Command+S).
To use the clip as a particle emitter cell source:
1 With the clip selected, click the Make Particles icon in the Toolbar (or press E).
A new particle system is created with a duration of 300 frames. The original butterfly
object, now a cell source, is turned off, and a new emitter is created using the butterfly
movie as its particle cell source.
2 In the Layers tab, double-click the emitter’s name, Emitter, and change it to Butterflies.
The large number of butterflies are all the same size, too large, and too close together.
Change this with a few quick adjustments to the emitter. Make adjustments starting
from the top of the Inspector and work your way down.