SplitAndStick example file

Interesting use of the Follow POP. An initial particle system is emitted off of a grid. The particles are then forced into an orbit using an Orbit POP.

The Follow POP is then activated at a specific frame (150) by the following syntax in the Follow POPs' activation field: $FF > 150, meaning 'If the current frame is greater than 150, then activate me'.

A second Source POP is piped into the leader input of the Follow POP. The neat trick here is that the second Source POP births the same number of particles as the first source POP, and these particles are not given any velocity. They are born and just stay where they are born. This gives the illusion that the particles leave one grid, fly around for a bit, and then go stick onto the other grid.