Transform array with Particles

Hello guys, I have a little problem!
I want to generate a array form a particle system using transform arrays.
And I want only used particle in a certain definite space… I use a kill box affector to get the particle I’m interested… but the transform array doesn’t seems to take fully this affector in count and generate array for some particles that supposed to be …dead … any thought ?

Is this realate to this :

The number of elements in the array may vary per frame, up to the defined maximum. The source of the transforms is typically a GPU buffer, so there is some latency in accessing them.

Any solution for me :slight_smile: ?

Thanks you ! :slight_smile: