Assetto Corsa in VRPC

[Masscot]

@Masscot does yours work with OpenComposite_acs (acs.exe)?

Yes, that's what mine says.

 

[Masscot]

OK, having had a play with the toolkit menus I can confirm that everything seems to be working, even foveation.
I now know why I changed the menu overlay from ctrl+down, it's because that's what I use to fly around in VR.
The toolkit menu is one of the most frustrating UIs I've ever used. Why the hell is simple mouse navigation not possible?
It's so counterintuitive it's far too east to accidently break a previous setting without any way to revert.
Hateful, hateful UI.

To those who still cannot activate the overlay UI, try unticking fullscreen in AC video options. That's the only thing I can think of.

 

[Cote Dazur]

OK, having had a play with the toolkit menus I can confirm that everything seems to be working, even foveation.

So, if I understand correctly, you can access toolkit in game using Oasis, like we used to with OpenComposite.

 

[Masscot]

So, if I understand correctly, you can access toolkit in game using Oasis, like we used to with OpenComposite.

Yes, using the 'down' arrow with my ctrl modifier. The overlay settings menu appears exactly like it did with WMR (and is just as horrible to navigate).
I really need to change activation (and navigation) away from the arrow keys because at the moment those navigate the menus but also make my VR viewpoint fly around if I'm in F7 cam.

 

[Cote Dazur]

Yes, using the 'down' arrow with my ctrl modifier. The overlay settings menu appears exactly like it did with WMR (and is just as horrible to navigate).
I really need to change activation (and navigation) away from the arrow keys because at the moment those navigate the menus but also make my VR viewpoint fly around if I'm in F7 cam.

It is my turn to be puzzled, as I cannot get that menu to appear in AC using Oasis.
Probably some setting somewhere, at least now, I know it can be done.
It is probably not a setting in AC, as the menu does not appear in any other games either, it used to with WMR, so not specific to AC.
I know it works because I can see it in AC Evo, which is different from all other of my games as it runs OpenXR native. So it by pass OpenVR in Steam VR.
Something in my SteamVR setup is blocking that menu for me.
As mentioned before: The plot thickens.

 

[Codexas]

Hey all, wondering if there is a friendly soul out there who can help:

I am running Assetto Corsa using Virtual Desktop + OpenVR + Opencomposite (mandatory) + OpenXR Toolkit and the companion. I found it gave me like 30fps extra over running it through SteamVR and Airlink, which was a HUGE surprise.

Question 1:

Is this the right thing to do in 2025? Is there any new tidbits I've missed?


Question 2:

The only downside I have in running it in (actual) OpenVR is that the little yellow mouse dot in the pre race menu when you are sitting in the car, the mouse isn't able to cover all of the screen. There is like an invisible wall. Using the Quest 3 handcontroller does cover the whole screen, but it sometimes takes over the dot sometimes not. It's very frustrating. Often I have to hit ALT+F4 at the end of the race just to be able to get back into content manager.

I've tried a myriad of options in Assetto-> Video, checking fullscreen on and off, fix res automatically, changing the default to my screen, etc. Nothing helps.

Quest 3
5070Ti
Assetto Video set to OpenVR and custom resolution at 3000x3000x0
My actual pc screen is a 1920x1080 display
I don't run passthrough or mixed reality
I have all settings maxed out in Assetto and the in game renderer shows 112 fps, so performance isn't an issue

 

[Masscot]

It is my turn to be puzzled, as I cannot get that menu to appear in AC using Oasis.
Probably some setting somewhere, at least now, I know it can be done.
It is probably not a setting in AC, as the menu does not appear in any other games either, it used to with WMR, so not specific to AC.
I know it works because I can see it in AC Evo, which is different from all other of my games as it runs OpenXR native. So it by pass OpenVR in Steam VR.
Something in my SteamVR setup is blocking that menu for me.
As mentioned before: The plot thickens.

View attachment 1477669

View attachment 1477670

View attachment 1477671

Very weird indeed. I can't see anything obvious in your SteamVR settings.
It'll be something simple somewhere and you'll kick yourself when you find it.

My Oasis conclusions so far:

• OpenXR toolkit seems to work fine (hooray!)
• Tracking seems normal
• Performance does seem to be down slightly compared to what I've been used to with WMR, but that could be any of a whole host of variables and not because of Oasis
• I will never miss those pointlessly annoying WMR splash screens or that cliff house environment with the tweeting birds
• My audio no longer gets hijacked by the headset on starting VR, only Crew Chief comes through the G2 headphones now, as intended. Main audio gets piped through my amp automatically.
• Everything just seems slicker and quicker with less faff compared to the WMR bloat.

Who would have thought that Microsoft actively working to brick our WMR headsets would have eventually led to a much better experience thanks to the tireless work of one genius coder?
Microsoft actually did us all a favour with their scorched earth WMR policy.

 

[Cote Dazur]

It'll be something simple somewhere

I think I now why, I am on 24H2 and you are on 23H2.

OpenXR tools is not compatible with my OS

 

[Masscot]

I think I now why, I am on 24H2 and you are on 23H2.

OpenXR tools is not compatible with my OS

View attachment 1477802

So 24H2 not only kills WMR, it also kills OpenXR?
Goddamn.
Seems like I have to keep trying to block 24H2 then, just when I was about to allow it.
That is terrible news. The OpenXR toolkit makes a HUGE difference to performance.

@Cote Dazur maybe ask the question in the Steam forum I linked to recently, maybe the dev will clarify what the issue is?

 

[Cote Dazur]

So 24H2 not only kills WMR, it also kills OpenXR?
Goddamn.
Seems like I have to keep trying to block 24H2 then, just when I was about to allow it.
That is terrible news. The OpenXR toolkit makes a HUGE difference to performance.

OpenXR tools still works for me, if I do not allow it in Steam VR I can see a difference, it is access to the OpenXR toolkit ingame app that I do not have access to.
Except for AC Evo, where I can access everything, probably because it runs native on OpenXR.

 

[Masscot]

OpenXR tools still works for me, if I do not allow it in Steam VR I can see a difference, it is access to the OpenXR toolkit ingame app that I do not have access to.
Except for AC Evo, where I can access everything, probably because it runs native on OpenXR.

So it's impossible for you to make changes to the OpenXR Tools settings in AC now?
But existing settings work?
Are they global settings, or per-game?
Can you alter the settings in AC Evo (where the menu overlap appears fine) and then they'd translate to AC?

 

[Cote Dazur]

So it's impossible for you to make changes to the OpenXR Tools settings in AC now?

not possible now.

But existing settings work?

I believe so, but I am not able to verify, all I know is that it looks and run better with OpenXR toolkit layer API on in SteamVR.

Are they global settings, or per-game?
Can you alter the settings in AC Evo (where the menu overlap appears fine) and then they'd translate to AC?

I don't know, with WMR they were per game settings, I assume they still are, but not sure.

 

[Pekkahe]

Guys, are you now mixing OpenXR tools and OpenXR toolkit. Former works with WMR and latter is the tool that Mbuccia made for opencomposite.

 

[Steve Hayward]

not possible now.

I believe so, but I am not able to verify, all I know is that it looks and run better with OpenXR toolkit layer API on in SteamVR.

I don't know, with WMR they were per game settings, I assume they still are, but not sure.

Right, so I have been catching up with the posts on this now I am around.
I have exactly the same settings as you and cannot see the toolkit menu.
Have tried to replicate mascots findings and settings, no change.
If I go off full screen in CM I get the 60fps as I always did.
I do get small micro judders at times.
Toolkit is definitely working as before in terms of graphics.
My conclusions are that I was happy with the settings I no longer have access to so I can ignore that.
The only thing I need to change is the pixel density which I can do on steam anyway. I also rediscovered the per game
slider which I had set to 150% before I used open composite and the toolkit so I have found my stutter for sure.
Did the oasis update.
Oh, and just to confuse things, I am still on 23H2.
Just happy it is still working and for now I'll work around the small stuff.

 

[Masscot]

Right, so I have been catching up with the posts on this now I am around.
I have exactly the same settings as you and cannot see the toolkit menu.
Have tried to replicate mascots findings and settings, no change.
If I go off full screen in CM I get the 60fps as I always did.
I do get small micro judders at times.
Toolkit is definitely working as before in terms of graphics.
My conclusions are that I was happy with the settings I no longer have access to so I can ignore that.
The only thing I need to change is the pixel density which I can do on steam anyway. I also rediscovered the per game
slider which I had set to 150% before I used open composite and the toolkit so I have found my stutter for sure.
Did the oasis update.
Oh, and just to confuse things, I am still on 23H2.
Just happy it is still working and for now I'll work around the small stuff.

Very weird that I can see the menu and you two cannot.
Maybe try turning off both modifiers and pressing every single key in sequence?

 

[Pekkahe]

From toolkit ui press Open log file and at bottom find circled entry. Maybe this will help.

 

[Cote Dazur]

Very weird that I can see the menu and you two cannot.
Maybe try turning off both modifiers and pressing every single key in sequence?

In my case the key sequence is not the issue since CTRL + arrow down works for Evo.

 

[Masscot]

Another observation with SteamVR vs WMR: average session framerate is now properly recorded in CM as 90fps, whereas with WMR it would always only be 89.9fps at best, never displaying the full 90fps.

 

[Steve Hayward]

From toolkit ui press Open log file and at bottom find circled entry. Maybe this will help.

Confirmed my ctrl and arrow down but still did not open unfortunately

 

[Steve Hayward]

Another observation with SteamVR vs WMR: average session framerate is now properly recorded in CM as 90fps, whereas with WMR it would always only be 89.9fps at best, never displaying the full 90fps.

I used to see 90.. sometimes

 

[Cote Dazur]

Just a Friday update on my Oasis experience, been using it for 32 hours, according to Steam.
I like the interface, as I am getting better with SteamVR, which I never used before since I came from Oculus and jump directly to Open Composite/WMR.
The performance is equal to what I had with Open Composite/WMR, at least, not lost anything.
Very happy to have made the switch, now I just enjoy my G2 without the irritations from WMR.

 

[Masscot]

Just a Friday update on my Oasis experience, been using it for 32 hours, according to Steam.
I like the interface, as I am getting better with SteamVR, which I never used before since I came from Oculus and jump directly to Open Composite/WMR.
The performance is equal to what I had with Open Composite/WMR, at least, not lost anything.
Very happy to have made the switch, now I just enjoy my G2 without the irritations from WMR.

Yep, it's fantastic, isn't it?
Have you bought a spare G2 yet?

 

[Steve Hayward]

No problems my end either. I still can't get into toolkit but I did not need to before so will leave it for now.
I do have a few micro stutters even though I am maintaining 90fps, but I think its my fault for trying to get a little extra out of it.
Both you guys are more pc savvy than me so can I ask you if my 5800x 3d cpu will bottleneck if I go from a RTX3080 to a RTX4080?
Surprisingly, my cpu runs in the high 90%s on some tracks but never goes in the red. Any thoughts?

 

[Masscot]

No problems my end either. I still can't get into toolkit but I did not need to before so will leave it for now.
I do have a few micro stutters even though I am maintaining 90fps, but I think its my fault for trying to get a little extra out of it.
Both you guys are more pc savvy than me so can I ask you if my 5800x 3d cpu will bottleneck if I go from a RTX3080 to a RTX4080?
Surprisingly, my cpu runs in the high 90%s on some tracks but never goes in the red. Any thoughts?

No idea, sorry - and I am definitely LESS PC-savvy than the average person, lol.
My current gaming rig (RTX 4080, i9-13900kf) was an pre-built off-the-shelfer.

Re the microstutters, I sometimes get them and sometimes not, even with exactly the same car/track/weather/ToD combo. No idea why, but I have a theory that I need to run AC straight from a clean boot to avoid them, without any browsing/YouTube/downloading etc beforehand, even if all those processes have been properly shut down. And weirdly, when the microstutters happen, CM still reports a rock-solid 90fps.

 

[Steve Hayward]

Yeah, when I said savvy I meant I have no clue how you mod and it blows me away when I see what you and many others achieve
with this game.
I guess its easy to assume that its all easy for modders who know pc language inside out.
Never imagined you would buy a pc off the shelf as an example.
The irony is, I enjoy building the thing from scratch but still struggle managing files and folders.
Each to there own I guess.
Anyway, back on subject. Used 4080 looking better value these days and offset by selling the 3080 seems like a good swop for me.

 

[Vintagedriver]

No problems my end either. I still can't get into toolkit but I did not need to before so will leave it for now.
I do have a few micro stutters even though I am maintaining 90fps, but I think its my fault for trying to get a little extra out of it.
Both you guys are more pc savvy than me so can I ask you if my 5800x 3d cpu will bottleneck if I go from a RTX3080 to a RTX4080?
Surprisingly, my cpu runs in the high 90%s on some tracks but never goes in the red. Any thoughts?

Not saying I have the wisdom to determine what’s wrong from a distance without seeing your PC. 👨‍🎓 only beside fly/race simming my other interests is optimization.
I do have an i9-9900KS 5,2Ghz OC/RTX5070ti for PCVR and your 5800X3D is smashing my i9 in every performance benchmark corner. 🥊
It’s maybe not a clear to notice solution, but I have cleaned out my Win10. Think your OS is a bit full of not needed garbage. Try to limit some of the not needed Microsoft services and processes. There is free software for doing that like from ChrisTitusTech or O&O shutdown. For the rest it is all manually like deleting AI functions and Onedrive.

Then there is still the aspect of the AC singlecore use, guess in your case it’s always one core that’s overflowing. My border here is btw 80% as it’s the not to detect 100% peaks that are harmful. My remedy is to make 3,4 or maybe 5 cores dedicated to AC only, set its priority to high and shut down every not needed stuff (reduce stutters).
For doing this I use free software from Bill2soft https://www.bill2-software.com/processmanager/download-en.shtml
Other alternative from I do know are free and can save the settings, are “process lasso” and https://systemexplorer.net/
SystemExplorer and Bill2software are rather old but still working and simple to use. Let me know if there are modern free alternatives available. 💡
Did try the Process Lasso free version 10y ago and I did notice a lot of core load, so to me this software is like setting the horse at the back of the wagon. You want to reduce but get another load of crap back.

About the micro stuttering try to stop onedrive, automatic updating, windows & Steam phone back, virus scans and other unexpected activities.

 

[Masscot]

Yeah, when I said savvy I meant I have no clue how you mod and it blows me away when I see what you and many others achieve
with this game.
I guess its easy to assume that its all easy for modders who know pc language inside out.
Never imagined you would buy a pc off the shelf as an example.
The irony is, I enjoy building the thing from scratch but still struggle managing files and folders.
Each to there own I guess.
Anyway, back on subject. Used 4080 looking better value these days and offset by selling the 3080 seems like a good swop for me.

I'm very happy with my 4080 but know nothing about the Radeon CPUs I'm afraid - there are benchmark websites that'll tell you if it's a good combo though, or whether you'd need to upgrade the CPU.

Re the microstutters, my earlier theory was disproved this morning. I'd been watching YouTube and downloading a game while installing another, and a 12-car race ran butter-smooth even when unpacking and installing another game in the background, which is normally a really intensive CPU process.
The mystery continues.

 

[Vintagedriver]

I'm very happy with my 4080 but know nothing about the Radeon CPUs I'm afraid - there are benchmark websites that'll tell you if it's a good combo though, or whether you'd need to upgrade the CPU.

Re the microstutters, my earlier theory was disproved this morning. I'd been watching YouTube and downloading a game while installing another, and a 12-car race ran butter-smooth even when unpacking and installing another game in the background, which is normally a really intensive CPU process.
The mystery continues.

So if you fire up your CPU and let it work, then the stuttering in AC is gone? Looks more the behavior of a very powerfull CPU with cores that’s wake up from a sleep. What CPU do you have, its maybe to do with all those modern techniques of high performance and low energy cores , Intel did introduce after HyperThreading. I do not know how this process is working, but could you shutdown those energy efficient cores permanently and doing the test?

Also I’m trying the test Nvidia shared memory access or SAM. For the preparation in moving to win11 in October, I noticed that SAM is now being available. What if you disable that function, my thoughts is with 32Gb of RAM and 16gb of Vram, SAM is not needed while for an old game as AC this can only be contra productive.

 

[Masscot]

So if you fire up your CPU and let it work, then the stuttering in AC is gone? Looks more the behavior of a very powerfull CPU with cores that’s wake up from a sleep. What CPU do you have, its maybe to do with all those modern techniques of high performance and low energy cores , Intel did introduce after HyperThreading. I do not know how this process is working, but could you shutdown those energy efficient cores permanently and doing the test?

Also I’m trying the test Nvidia shared memory access or SAM. For the preparation in moving to win11 in October, I noticed that SAM is now being available. What if you disable that function, my thoughts is with 32Gb of RAM and 16gb of Vram, SAM is not needed while for an old game as AC this can only be contra productive.

i9-13900kf

 

[Vintagedriver]

i9-13900kf

it does have the P(erformance) and (E)fficiency cores.

I know nothing on this P+E point but here AI answer: Performance cores, or P-cores, are designed for high-intensity processing tasks, offering higher clock speeds and advanced capabilities for demanding applications like gaming and video editing. They work alongside efficiency cores (E-cores) in a hybrid architecture to optimize performance and energy use.
Keep in your mind as they always explain in forums and on Youtube, Intels Hyper Threading virtual cores on my i9 does NOT have any effect in gaming. My testings shows the opposite.
Maybe similar is counting for disabling the E cores, so always test this.