| Parameter | Description | 
|---|---|
| t | Time period in seconds to advance the ParticleSystem simulation by. If restartis true, the ParticleSystem will be reset to 0 time, and then advanced by this value. Ifrestartis false, the ParticleSystem simulation will be advanced in time from its current state by this value. | 
| withChildren | Fast-forward all child Particle Systems as well. | 
| restart | Restart and start from the beginning. | 
| fixedTimeStep | Only update the system at fixed intervals, based on the value in "Fixed Time" in the Time options. | 
Fast-forwards the Particle System by simulating particles over the given period of time, then pauses it.