Kill particles inside this volume?

Hi guys! I have a underwater scene and i placed some floaty particles around (GPU sprites) , now im trying to eliminate the particles inside the submarine… Any good idea how to achieve this?

Any help will be so much welcomed

Since you’re using GPU particles, the particles can bounce off and collide with things.
Set up blocking volumes around your sub.
More on the collision module:

Another thing you can do is if you don’t want these bubbles obscuring the camera, add a pixel depth node to the material so they fade away when they’re too close to the camera.

Following on this question but 2 years on now in 4.25, I’m running a niagara sprite particle effect (smoke essentially) that I want to exclude from the inside of a car following. I have my collisions set up in the car, but does the Niagara Particle system need to be set to GPU instead of CPU to work, is that correct?

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