[UE4-25] Particle stutters the first time it is spawned

Development Asset Creation
, ,
1

The first time I spawn a particle, it seems to stutter and ends up with a weird square around it (see screenshot). The problem does not occur when spawning it fom the second time and onwards.

Even if I close the game window and execute it again, the problem does not happen again. It only returns if I completely close and reopen the Unreal Engine.

To spawn the particle, I am using the “Spawn Emmiter at Location” node. Also I am using Unreal 4.25.

After running the profiler, I can see that there is a spike in the Game Thread in the exact frame when the problem occurs. It indicates that the spike is in the “self” event name, but I don’t know what that means.

Does anyone know what may be causing this and how to fix it? Any tips on how to further investigate?

2

did you have tried to build the game? maybe is something that happens only inside the editor.

3

Sadly, yes, that’s the first thing we tried. Both shipping and development packaging, problem persists :confused:.

4

maybe spawn it off screen the first time. then move it where it needs to be

5

That’s a good a idea to mitigate it, I’ll try it out. But I’d also like to understand the root cause, although I’m kind of out of ideas on what else to debug.

6

Did anyone figure this one out ? Spawning all emitters used at once client side on begin play to avoid later stutter is not an ideal solution.

7

Bump, looks for solution different then spawning all particles on level