Apple Motion 2 Tutorials - Manual (Page 174)

174 Tutorial 4 Working With Particles
Adjusting the Shape of the Particles
In this section, adjust the shape and scale of the particles by modifying the emitter
parameters.
Important: Remember that manipulating the source object within Motion does not
affect the particle emitters using that object. In other words, to change the particles,
change the emitter, not the source object.
For this project, change the default shape of the particles by changing the scale of the
particle cell.
To change the scale of the particle cells:
1 In the Layers tab, select the Blue Lights emitter.
2 In the Emitter tab of the Inspector, click the disclosure triangle next to Scale.
Notice the dot on the Scale slider control, which indicates that the Scale X and Scale Y
parameters have been adjusted to different values. If both are set to the same value,
the dot does not appear.
3 Set Scale X to 100 percent.
4 Set Scale Y to 50 percent.
The particles change shape with each adjustment.