Apple Motion 3 - Manual (Page 995)

Chapter 11 Working with Generators 995
5 Play the project (press Space bar).
Soft gradient particles are emitted.
You can change the particle color, emitter shape, scale, emission angle, birth rate, and
so on in the Emitter controls. For more information on working with particles, see
“
Working with Particles ” on page 685.
Modified particles using the Soft Gradient
generator as a particle cell source