I have a plane emitter, sending boids toward a target.

enter image description here

By entering Edit mode while the plane is highlighted, and then selecting Particle Edit mode, I can see the particle routes, as hairs:

The specific need is to ID boids who pass through other objects or in places they're not wanted.... and to do so by killing the offending boid without changing the rest of the baked action for the remainder of the boids.

enter image description here

How can I delete a specific boid or route/hair, but allow for the animated action to take place for all of the other boids?

OUTSTANDING assistance. I thank you, as does my mosasaur.

enter image description here

  • $\begingroup$ You could place a small object in its path, turn on physics collision and enable kill particles. $\endgroup$
    – sambler
    Jul 8, 2018 at 4:50
  • $\begingroup$ Related Using a "post prod" scripting solution to zero out particles based on some condition. $\endgroup$
    – batFINGER
    Jul 8, 2018 at 7:40

1 Answer 1


I don't think you can actually delete the boid or its path but you can move it out of the way so that it isn't visible as part of the simulation.

This can be achieved using the Particle Edit mode after you have Baked your simulation. Note that this must be baked into memory rather than a disk file - since the Particle Edit can only operate on particle systems held in memory.

In Particle select mode, choose the 'Point' select mode to allow you to manipulate all points in the particle system.

Point select

You might also find it useful to increase the Draw Path Steps in the Toolshelf (T) to make the visible paths more detail (makes it more smoothed). Also, disable the Keep Root setting so that you can move the whole path without it being joined to the emitter (used below).

particle edit settings

Select one of the points on the path you want to 'move'

select point

Then hit L to select 'Linked' - ie, select the whole path.

whole path

You can now 'grab' (G) the path and, since it's disconnected from its 'root' (the toolshelf checkbox you unchecked earlier) you can move it away from the emitter.


To make the selected boid even easier to 'hide' you can scale the path to zero to make it occupy a single point with S0Enter.


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .