Customizing a Particle System In Motion
Although Motion comes with an array of particle system presets such as rain, smoke, clouds, etc; it's an absolute must to know how to create something that is completely original to add that personal touch to a project!

The creation of a particles system begins with designing your own particles that you wish to emit. You can use any image, shape, text, or movie that is supported by Motion as a source for a cell. With that in mind, still images are the easiest to create and make the fastest emitters. After you have created your own personal design elements, select an object as your source for a new particle emitter and use the dashboard to manipulate Birth Rate, Life, and the scale of the emission.
