Hello. I’ve created a simple scene and getting very low FPS in it. How can I found out what’s the problem?
I’ve tried stat RHI and stat game commands, so here’s what I see:
On a fresh 5.3+ project, Lumen, TSR, and VSM are enabled by default, and they can be quite expensive depending on your hardware
You can try stat gpu to see what the GPU is spending time on, since your game thread seems to be fine
Also the editor adds a lot of overhead that you won’t see in a built game, you can try the Play in Standalone mode to get a bit more accurate numbers (although still not equivalent to what you’d get in a build)
I suppose the main problem is TSR, and something called LumenScreenProbeGather. If I’m using FHD resolution should I even use TSR? And what is LumenScreenProbeGather? Can I optimise it somehow or I can only enable/disable lumen?
You can play with the lumen settings in your post process volume and see how each affects quality and performance, but I haven’t done that in a while to be able to give you any pointers sadly
About TSR, it’s a tough question to answer, there are plenty of settings to tweak, and it is used by Fortnite and many other games on PC and console that run pretty good.
That being said, you do have a quite old and relatively weak GPU, so I would keep my expectations low. But you should be able to get ok FPS depending on your game’s fidelity, if you disable Lumen, and maybe lower the screen percentage a bit
You can also explore implementing FSR, which can run on your GPU and might help improve the framerate a bit, although it will have its own set of potential issues
Got it. Thank you!
