How to use Maya fields for navigation
Notice that particles can also be animated with regular Maya fields instead of using the Navigation behavior provided by Golaem Crowd.
To do so, first, create a Maya Field (Dynamics / Fields /…) and customize it (typically for a uniform field, you would setup the attenuation (set it to 0), direction and magnitude).
Then select the created field and the particle system you want to animate. Affect the field to the particle system.
Click the play button, the particle should move according to the direction given by the Maya field.
Particle systems moving thanks to a Maya uniform field