Line Trace and Niagara Particles

Development Asset Creation FX
1

Hi All

I am trying to use line tracing to detect the presence of individual Niagara particles. Ideally I want to use something like Multi-Line Trace to find all the particles along the path of the trace.

I have tried every combination of trace and Niagara collision setting I can find and it seems as though Niagara particles cannot interact with traces. A similar issue has been asked before here: Can Line trace hit a particle? - Blueprint Visual Scripting - Unreal Engine Forums but it is unresolved so I am asking again now.

I am still quite new to unreal so simpler explanations would be greatly appreciated.

Unreal version 4.24.

Thanks

2

Particles are not part of the Physics Scene, so you can’t run trace/collision queries against them. (It would probably be enormously expensive to do so too).

Particle “Collision” is internal and usually one-way, it’s so that particles can react to the content of physics scene, but they can’t affect it.