xpGeometry Object tab menu.
Checking this box activates xpGeometry.
Set at Independent, by default.
You can change this to Action-Controlled.
In this mode, particles will be affected if they come into the field of effect of the modifier.
When in the Action-Controlled Mode setting, the modifier will only act on a particle when told to do so by an action.
If this is unchecked, the generator will not generate an object for this particle.
This refers to the index of the child object of the generator (see the Generator object for more details).