Hi,

Ive set the impulse count to $FF >28 && $FF <30. This is the impact point where the box hit the floor. How can I decide how many particles that should be emitted at that point?

Stig

It's not really clear what you're trying to do, but if you want to emit, say, 25 particles at frame 29 you should do this in the particle emitter node

impulse activation $FF == 29
impulse count 25

This will emit 25 particles at frame 29.

If your box is rbd then rather than using impulse activation frame manually (by feeding 29), use procedural way to get that frame. Use dopfield() expression function.

dopfield(“dopnet”, “box”, “Impacts”, “Impacts”, 0, “impulse”)>0

You can also use dopimportrecords sop.