Is it possible to create a particle system with collision that spawns additional particles on impact? For example rain drops that spawn splashes on the position of the impact with the floor

You can use an event generator to do this, the wiki link is a good resource. I would suggest you consider using the kill box/kill plane, coupled with a death event for spawning your splashes, CPU particle collisions can be expensive on your game thread if you are working on a real-time scene. You …

Particle collision spawn child particles on impact

Development Asset Creation FX

Rama (Rama) March 24, 2014, 10:03am 2

#Particle Events

UE4 Wiki Link

Enjoy!