5.5

537Motion User Guide
Make particles intersect with other layers
Particles can intersect with other rotated layers in 3D space.
• In the Emitter Inspector in Motion, click the Render Particles pop-up menu, then choose
In Global 3D (Better).
In the following image on the left, with Global 3D selected, particles intersect with other
objects in the project that are transformed in 3D space. In the image on the right, with
Local 3D selected, particles do not intersect with other objects.
Particle system timing in Motion
When you create a particle system, its duration can be as long or short as necessary,
regardless of the duration of the original source layers used to create the particle system.
The duration of a particle system is defined by the duration of the emitter object. Changing
the In or Out point of an emitter in the Properties Inspector, Timeline, or mini-Timeline
changes the duration of the entire particle system.
By default, particles are generated by every cell in a system for the duration of the emitter.
The duration of each generated particle is defined by the Life parameter of the cell that
generated it, and not by the duration of the cell itself.
The duration of the cell governs the time span over which new particles are generated. You
can change a cell’s duration by dragging its position or its In and Out points in the Timeline.
In this way, you can adjust the timing that defines when each cell’s particles emerge.