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Apple Motion 3 User Manual

Page 702

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702

Chapter 8

Working with Particles

4

Drag to lengthen the arrow so that it is approximately halfway between the center and
the edge of the emission control to create a slowly drifting column of particles.

Remember: While the angle of the arrow controls the emission angle of the particles,
the length of the arrow controls the speed of the particles. The longer the arrow, the
faster the particles, and vice versa.

At this point, the particles are all moving in the correct direction, but there aren’t very
many of them (there isn’t much of a fire yet).

5

Move the Birth Rate slider to the right to increase the number of particles created by
the emitter.

As you increase the birth rate, more particles are created, forming a nearly unified
column of “smoke.” The particles move farther apart as they drift away from the emitter.

As you can see, a single object can be used to create a credible column of smoke rising
gently into the sky.

While the HUD controls are quite powerful, the Emitter and Particle Cell tabs in the
Inspector have many more parameters you can customize. For more information, see

Advanced Particle System Controls

” on page 712.