I have a lot, a lot of performance problems, I almost never had such a low fps problem in 5.2. There is almost nothing in the project, the lights don’t even overlap with each other, yet I have a crazy fps drop. Lumens on doesn’t make much difference. But I have to use Lumen, otherwise the faces of the objects become gray when there is no light. I don’t know what to do. I turned off UDP, TCP, TELEMETRY, otherwise the Engine is also stuttering. I have an RTX 3060 laptop, it’s ridiculous that it even stutters :D. I’m throwing the performance with Lumen on and off below.
You can expand the Post Processing to see exactly what costs so much, 45ms for PP is insane. Maybe you use a very unoptimized Post Process Material?
I use my post process material in 5.2 my last project. No differences…But in 5.4 idk it cost so much now?
Root causes found: (on my case)
- The default settings on the current post process volume in version 5.5.3 have added the Hit Lighting option in Ray Lighting Mode, which changes the default value of Ray Lighting Mode.
- The default Lumen settings use “Surface Cache” or “Hit Lighting For Reflection” for Ray Lighting Mode.
- Calculations in the new “Hit Lighting” mode apply to both GI and Reflection, requiring more GPU processing power, resulting in heavier performance impact.
5.4 have no Hit Lighting
5.5.3 adding Hit Lighting option and turned to be default (idk the mechanism)
Maybe this can help u.