Apple Motion 4 - Manual (Page 656)

This example uses a simple star graphic.
2 With the new layer selected, click the Make Particles icon in the Toolbar (or press E).
Once an emitter is added to the project, the following occurs:
• The emitter appears in the Layers tab and is selected.
• A cell containing the image to be “particle-ized” appears underneath the emitter.
• The original source layer (cell source) is disabled.
• In the Canvas, the emitter bounding box appears, which can be transformed using the
onscreen controls.
• The first particle appears in the Canvas in the same location as the original object.
Although it appears as if the particle is selected, it is actually the bounding box for the
emitter.
• The Emitter HUD is displayed. If you have hidden the HUD, press D or F7.
Note: For projects with a frame rate greater than 30 fps, at times only the bounding box
(not the particle cell) may appear at the first frame of your project. Because particles are
generated at a rate of 30 per second, there is no guarantee a particle will appear on every
frame.
3 In the Emitter tab of the Inspector, choose Circle from the Shape pop-up menu.
4 Choose Tile Fill from the Arrangement pop-up menu.
5 In the Cell Controls section of the Emitter tab, set the Initial Number parameter to 12.
656 Chapter 11 Working with Particles