Script interface for the ExternalForcesModule of a Particle System.
| enabled | Specifies whether the ExternalForcesModule is enabled or disabled. |
| influenceFilter | Apply all Force Fields belonging to a matching Layer to this Particle System. |
| multiplier | Multiplies the magnitude of external forces affecting the particles. |
| IsAffectedBy | Determines whether any particles are inside the influence of a Force Field. |