As I understand it, units released from spawners will either join an existing unitgroup (if close enough) or start a new one. Still not exactly clear how this interacts with "on_unit_group_finished_gathering" event, but adding an "on_attack triggered" event, when the group leaves their rallying ...

Hi all, I really want biters and pentapods to be able to exist on the same surface and be affected by their respective pollution types.

My basic idea of implementing is copy the surface but only include biter spawners. Any pollution that would be added to the main surface chunk is instead added to ...