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kill offscreen particles?

Hey all,

I created a GPU particle system that would make it rain over a level with stacked buildings.
Does anyone know if it’s possible to kill off particles on top of the buildings so it wouldn’t rain underneath it or inside the buildings.
Collision only works when the collision happends in the view.

Or would there be a better way to approach this?

bumpty dumpty

You can add a ‘Kill’ volume in the shape of a box to kill particles that enter it. I’m not entirely sure however, if they work with GPU particles.

Another way would be to split the particle system up, or have several emitters that use ‘Initial Location’ and split the spawning of the particles around the building, instead of in one large volume.