Hay guys, i have a problem that i can`t resolve. Basically, i have sci-fi project with ton of small emissive things everywhere. When i migrated the project to UE5 i thought it would look nice but in reality, looks really bad, all these small emissive strips and props actually give very noisy flickering splotches everywhere, it looks really bad. And the more emissive stuff you have the more splotches you get. My Lumen setting are maxed out and nothing effects that .
Here how it looks in my project :
P.s. Video quality is bad is not so apparent but it looks worse than that .
I did some testing and found out that this is an issue only when the emissive surface is smaller, as soon as you scale up emissive surface everything looks fine and stops to flicker. Here is how it looks with wider emissive surface , its only an image because it looks exactly like that without any flickering and looks good.
Now i fail to see why you would need such a huge emissive mesh, in most case you would need smaller surfaces, especially in SciFi games. Things like lighting strips, small elements of props , glowing lightbulbs and etc. For non of those emissive works okay . So is there a way to turn it off from Lumen , and leave it only glowing but not affecting lighting? Using it as it was before?
This is indeed a Lumen problem. You can disable screen traces but generally I wouldn’t consider this a good idea.
r.Lumen.ScreenProbeGather.ScreenTraces 0
Most likely it will solve your issue, but at a loss of quality and likely distant GI.
Increasing the final gather quality of Lumen can also help to mitigate some of the impact of the noise. But it won’t help much unless you use a high value (like 6)
Yeah i tried that, not really worth it since it’s lowering the quality. Thanks though.
I get it, this may be a software limitation and may not be fixed , but at least if we have a toggle based on a prop in the details window, to include or exclude the emissive from Lumen would be awsome. Like we have right now for Emissive boost. In reality i don`t even need the emissive to go in GI for my project, i need just the glow and if i need something to go in GI i can actually add a light .
