Info Required [VR] Beta, Feedback MEGATHREAD (v1.0+)

Further information and reports are needed to assist development with a fix
Woodee

Woodee

Moderator
OK VR heads... Let's get your feedback on the recent changes

kpop-triples.gif


Previous thread(s):

Info Required - [VR] Beta, Feedback MEGATHREAD (June 2025 Update+)

OK VR heads... Let's get your feedback on the recent changes Current Build: 18913230 Please post in this thread with problems you encounter while running in VR. Be specific as you can, sometimes video may help illustrate the issues. Note: this is not a full release, we have included some...
community.lemansultimate.com community.lemansultimate.com

Please post in this thread with problems you encounter while running in VR. Be specific as you can, sometimes video may help illustrate the issues.

Note: this is not a full release, we have included some incremental improvements for those users that wish to try it.

Things to look for: Glitches, crashes, texture problems, unexpected behaviour etc. Only happening with certain gfx settings or game modes?

Follow this post format:
Windows Version:
PC Spec:
VR Headset make and model:
Using SteamVR or 3rd party plugins? (Reshade/Open composite etc...):
Bug Description:
Steps to reproduce:
Attach trace file (if applicable)
 
Don't know if this has been posted before as I'm some what new to LMU.

Windows 11
11900k + 3080ti and updated drivers
Quest3
Open composite with virtual desktop
Bug Description: When using the look behind key bind and lock horizon is in use the camera 'rolls' to it's final position when pressing and letting go of look behind. I'm sure this isn't an issue on flat screen but when in VR it's very jarring and queasy when driving.
Steps to reproduce:
In graphics turn on Lock Horizon. So set it to anything but off.
Map a button to look behind you, get on track and drive then use look behind.


When you turn off lock horizon the camera no longer 'rolls' when the button is pressed / depressed and flips quickly to the other camera.

Yes I can turn off lock horizon but sometimes things are too bumpy.
 
Windows Version: 11 Pro
PC Spec:
Processor 12th Gen Intel(R) Core(TM) i7-12700K, 3600 Mhz, 12 Core(s), 20 Logical Processor(s)
BaseBoard Product Z790 GAMING PLUS WIFI (MS-7E06)
Installed Physical Memory (RAM) 32.0 GB DDR5 @ 6000mhz
Name AMD Radeon RX 7800 XT
PSU Corsair TX850W
VR Headset make and model: Quest 3
Using SteamVR or 3rd party plugins? (Reshade/Open composite etc...): SteamVR

Bug Description: A solution and A problem

Starting with the bad. Performance on the VR since 1.0 has been next to unusable for me. I've tried messing with the quest itself, re-installing the game after each hotfix/update and I'm still unable to achieve consistent frames of 80+ like before. I made sure to test the VR in ACC and AC and found no issue. The best fix I found was having FXAA turned on and obviously everything on low, but even then around the pits and mulsanne straight my frames drop. I used to run the game at Medium/High with shadows turned on on some of the tracks and FXAA off, both with SteamVR and LMU Settings Widget.

The solution is to the micro-stuttering I'm sure a lot of people deal with. The game ships with open composite and as previously stated by @Lokki in the other Bug Reports thread, this open composite causes stutters. I have no idea where to even start as to why, but I also copied the openvr_api.dll from E:\Steam\steamapps\common\SteamVR\bin\win64 over to E:\SteamLibrary\steamapps\common\Le Mans Ultimate and this made the 55-60 fps I've been able to achieve after the updates feel smoother than when the game ran at 80 capped and reporting no stutters. I re-installed the game after trying this to be absoloutely sure that it is a game issue. I had the same problems as before and again, when I copied the openvr_api.dll it was a night and day difference. I would recommend any VR user to at least give this a try.

Steps to Reproduce: Launch into a Race Weekend with 38 Cars
Attach trace file (if applicable)
 
Performance since 1.0 has taken a nose dive. Before my fps were rock solid and locked. Now its a constant race full of huge dips.

5800x3d/32gb/9070xt
 
Replays plat at 60FPS and not the headset 90FPS

Game when driving runs fine at 90 FPS

v sync is off
Windowed of full screen makes no difference
 
Windows Version: Windows 11 Version 10.0.22631 Build 22631
PC Spec: 5090 + i7-14700 {"GPU-Vendor":"4318", "GPU-Memory":"32101", "CPU-Name":"Intel(R) Core(TM) i7-14700KF", "CPU-Cores":"28", "MEM-VirtualTotal":"69413", "MEM-PhysicalTotal":"65317", "MEM-VirtualUsed":"43215", "MEM-PhysicalUsed":"23845", "MEM-VirtualUsedByLMU":"19648", "MEM-PhysicalUsedByLMU":"8210"}
VR Headset make and model: Pimax Crystal Super
Using SteamVR or 3rd party plugins? (Reshade/Open composite etc...): Welp, OpenComposite used by LMU.. rf2SharedMemoryMap used by SimHub 9.09.4, CrewChief 4.19.1.16
Bug Description:
Crashes to desktop at random occasions. Sometimes just a freezed WebUI with no way to gracefully exit the executable.
Steps to reproduce:
First it was mostly happening at session start/exit or when entering the garage during a session/returning from the track. Also when loading vehicles at the start of a session but it now also happens mid-session even when racing race control events, where no vehicles should be removed/loaded during a race session I guess.
I'm aware that since v1.0 external requests to the games REST API cause freezes, excessive memory use and crashes so I updated and configured external apps to not use the REST API.
Attach trace file: Multiple Reports send via Bugsplat
 
massive VR stutters uncommon but deadly

it happens rarely but when it does my race is over.
 

Attachments

  • trace_2025_09_23_21_56_10-50.txt
    546.7 KB · Views: 2
Last edited by a moderator:
Windows Version: 11
PC Spec: 9800x3d / RTX5080
VR Headset make and model: Meta Quest 3, Virtual Desktop (OpenXR)

Bug Description:
Post Process effects like sun flare work in VR when set to "High" but only from outside the car.
Once inside the cockpit they get cut out. if I poke my head out of the car I see it again.
 
Fabz404 said:
Windows Version: 11
PC Spec: 9800x3d / RTX5080
VR Headset make and model: Meta Quest 3, Virtual Desktop (OpenXR)

Bug Description:
Post Process effects like sun flare work in VR when set to "High" but only from outside the car.
Once inside the cockpit they get cut out. if I poke my head out of the car I see it again.
Click to expand...
After a lot more testing I have found out the issue is strictly happening only with the Ferrari LMGT3. Something with the glass / windscreen shader of that car is clipping strong highlights to the point Yebis post process such as the sun flare / bloom don't trigger when inside the cockpit. Using many if not all other cars (admittedly I haven't tried all of them) it looks glorious inside and outside the cockpit view at sunset.
 
Happens since the last patch 1.2.4 (Or the one before but I didn't play during that time due to Ballast-bug)
Windows Version: 11
PC Spec: 5700X3D / RTX4080S / 32GB 3600mhz DDR4 RAM
VR Headset make and model: Pimax 8KX
Using SteamVR or 3rd party plugins? (Reshade/Open composite etc...): Pimax Play with OpenXR as runtime, no plugins
Bug Description: Sometimes the game starts running at single digit FPS, even in the menu and the startup screen or while leaving pits. Then I have to close the game, restart the Pimax service and start LMU again. Sometimes that works, sometimes not.
Steps to reproduce: Not applicable, seemingly random but high chance of it occuring when tabbing out of the game.

PS: in low lighting conditions it gets really hard to make out the track in VR, any fixes for that?
 
You must log in or register to reply here.
Back
Top