In a Niagara system, an effect set to Spawn Burst Instantaneous flickers for a moment.

Development Rendering
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1

Right after it spawns, it briefly flickers.

How can this be prevented?

This issue seems to occur even when I set up a simple effect like the one in the attached file.

2

再現手順

  1. Open NS_JumpPad included in the ThirdPersonTemplate.
  2. Delete all emitters except for GlowBase.
  3. In the level, use Spawn System at Location to spawn the Niagara component.
3

Hi Elpis,

Thank you for the report. This seems to be a bug, which did not happen up to UE 5.4, but I was able to repro it on UE 5.5, 5.6 and the latest source version. I filed an internal bug report for it, which you will be able to track once the devs mark it as public: UE-305563.

In my tests, I was able to stop the flickering by doing one of the following:

  • Lowering the “Loop Duration” of the Niagara System/Emitter, and making sure the particle “Lifetime” matches (or is set to “Emitter.CurrentLoopDuration”)
  • Setting the Niagara Emitter Life Cycle Mode to “Self”, the Loop Behavior to “Once”, and the Loop Duration Mode to “Infinite”
  • Disabling interpolated spawning on the Emitter Properties

Please let me know if one of these solutions works for you.

Best regards,

Vitor

4

Thank you support, Vitor.

  • Setting the Niagara Emitter Life Cycle Mode to “Self”, the Loop Behavior to “Once”, and the Loop Duration Mode to “Infinite”

This works.

I’m going to wait for bug fix, in future.

Elpis