I am using the “Side Scroller” blueprint if this means anything.
I have tried changing the value on the “Max Collision Distance” but sadly the issue still occurs.
Cheers, Marcel.
Hi ,
There are a few things I’ll need to ask you about the settings of your particle system to try to narrow down the issue.
Is your particle system a CPU or GPU particle system? Easy way to check this would be to put your camera about level with the floor and see if the sparks start going through. With a GPU particle system, it will only collide with what is being rendered on the screen so the sparks will go through, which may be causing problems if your scene depth is changing.
Is there a certain particle system that you’re basing your system off of?
Be sure to check that your Resilience (Which is under ‘Collision’) isn’t too high or too low. Resilience affects how much the particles will bounce once they hit the ground, which could be affecting how they appear. If the resilience is too low, they won’t bounce much at all. If it is too high, they’ll bounce up so fast that you won’t see them.
Are your Engine Scalability settings too low? To check that, try running the project in the Standalone Game mode or changing them all to ‘Epic’ under Settings → Engine Scalability Settings.
If none of these help pinpoint the issue, I’d suggest adding a default particle system and applying the “P_Sparks” template to it. Put it beside your other particle system and see if the same thing happens. If not, try comparing the different values to see which may be causing the particles to go through the floor.
I hope some of this information can help you, if not, please feel free to respond and I’ll try to assist you further.
Have a nice day,
Did you find the solution to your issue, ? For tracking purposes, I’ll be marking this issue as resolved. If you still require assistance, please feel free to comment and the issue will reopen.
Have a nice day,
Ah yes, thank you for the assistance, it was my resilience that was causing the issue. 
Glad to hear it. Be sure to come back if you have any more issues.