Hello,
I’m getting many reports of camera snapping / large lag spikes in my public playtest.
Managed to get a trace from a tester and seeing huge RHI stalls. This is only happening for a small portion of users. For others, the game runs seemingly well!
This happens on all hardware, both low spec and high spec. Also occurs on both AMD and NVIDIA cards.
Going to start stripping everything back and switching systems back on one by one, but really not sure what could be causing this?
Update:
Disabling virtual textures seems to have fixed this?
Unsure as to why
Possibly related, but we were seeing some crashes with Present and introduced a couple changes in 5.6 to fix those which seemed to address the issue we were seeing, but this is a crash fix not a stall fix.
CL#38629989 (d3f049e) Relaxed presentation check with additional logging
CL#39799334 (740624c) Re-enable D3D12 dummy backbuffer to work around crashes due to exiting or re-entering exclusive fullscreen where the backbuffer index gets out of sync.
Do you see any RHI warnings or errors in the logs? If you’re able to reproduce the problem reliably it’d be interesting to see what -d3ddebug outputs.
UNREAL ENGINE 5.4 EXTREMELY BAD PERFORMANCE - #132 by Krabworks
I see you also posted there tenpindan. Info for the staff on that thread @Petrockets.
