Worse with MT in VR, better on 3 screens.

[Pnguin9999]

Worse performance in VR than before the update with the stand alone MT version (Minus 15-25 FPS), also MT only runs in OpenXR with Steam VR. Here are all of the ways I have tried to start DCS MT and non-MT. Non-MT started directly from the Virtual Desktop tray icon uses the Oculus runtime and gets me between 35-54 FPS, no jitters. I have attached all of the logs and screen shots Big Newy asked for. The short mission recording is too big so here is a link to it on my YouTube channel.  The key here for Oculus and Pico users (the two most affordable headsets) and there are more of us than you think. 15 million Quest 2 and 590,000 Pico 4 sold, is that these headsets perform horribly with DCS in Steam/OpenXR. But ONLY with DCS, I run MSFS 2022, VTOL VR, Assetto Corsa Competizione, Project Cars 2, F1 2020 and the list goes on at high or ultra settings in Steam VR with no issues. Don't get me wrong, I think DCS is the best combat flight simulator in public access at this time. On triple screens with Opentrack, I have no performance issues with most settings maxed out. However, the depth perception and immersion in VR gives me a huge advantage low level in the A-10 and helicopters, simply because I know exactly how far my wing tips/rotors are from the trees I am flying between. I have gotten several kills on MIG 29s by making them come down to my playground to get a shot at me. My better half remarked the other day that I spend more hours trying to get DCS to work reliably in VR than I do flying. But in spite of all of that, I really am pulling for the DCS Team because there is nothing out there with combat aircraft that is as real as DCS. Please for us Oculus runtime folks, don't force us to go to Steam VR/ OpenXR. The attached game video is actually the best it has done yet, until the enemy and friendlies activate, then FPS tanks, down around 12 FPS. Enemy strength is only 4 BTRs and 40 infantry with AKs. Blue force is 3 APCs, one M60 tank and 40 infantry. The only aircraft are us four UH-1s.

EDIT Forgot to include the computer specs. 

System Specs,
MOBO=ASRock X570 Pro4
CPU=AMD Ryzen 7 5700X, 8 core
GPU=Zotac RTX 3060 Ti
RAM=TEAMGROUP T-Force Vulcan Z DDR4 32GB Kit (2x16GB) 3200MHz (PC4-25600) CL16 Desktop Memory Module
DCS Openbeta on a dedicated 2TB NVMe M.2 drive
Headset=Pico 4, CAT 8 Ethernet direct from a dedicated 5G router to an Ethernet to USB C adapter, steady 1200 MBPs.In game network latency never above 3 MS.
Newest versions of Pico 4 software, Virtual Desktop, NVIDIA driver (GeForce Experience not installed). Fresh Windows 10 install with all updates. VR benchmark = 97.
MSI Afterburner undervolted at 0.975/1995 MHz on a curve, power @110%, Fan Control Program (CPU and GPU temps never above 65,
because of the Corsair air flow case with 4 chassis fans and a massive Assasin CPU air cooler).

Edit I have run repair and clean and have deleted the contents of the FXO and Metashaders folders. Still the same.

 

Launch procedure

1. Start Pico 4 headset.

2. Start Virtual Desktop App in Pico 4 (Virtual Desktop streamer already running on PC).

3. Right click on Virtual Desktop tray icon.

4. Click on launch game, file explorer window opens, navigate to F:\DCS World OpenBeta\bin\DCS.exe

5. Double click on .exe

6. DCS launches without starting Steam or Steam VR, in Oculus runtime (runtime shown in VD performance display in headset),

Log shows this

2023-03-10 22:39:38.250 INFO APP (8372): Command line: "F:\DCS World OpenBeta\bin\DCS.exe"

2023-03-10 22:39:38.250 INFO APP (8372): DCS/2.8.3.37556 (x86_64; Windows NT 10.0.19045)

2023-03-10 22:40:02.109 INFO VISUALIZER (8372): VRG skip, ask for support if you own VRG helmet

2023-03-10 22:40:02.367 INFO VISUALIZER (8372): LAUNCH IN VR OculusRift: OculusRift : Oculus Rift S

Same process with MT

Log shows this and DCS starts Steam VR, runtime now shown as Openvr, main menu screen is below my vision level but keyboard down arrow re-centers view.

Loading screen super jittery, takes a long time to load, progress bars do not show, just Steam VR "Waiting on DCS".

Performance drop, average FPS 25-35 with Spacewarp (reprojection) disabled, unplayable with it on, ghosting everywhere. Stuttering, random short freezes (1-2 seconds).

2023-03-11 00:22:39.856 INFO APP (12060): Command line: "F:\DCS World OpenBeta\bin-mt\DCS.exe"

2023-03-11 00:22:39.856 INFO APP (12060): DCS/2.8.3.37556 (x86_64; MT; Windows NT 10.0.19045)

2023-03-11 00:23:04.436 INFO VISUALIZER (12060): LAUNCH IN VR OpenXR: SteamVR/OpenXR : oculus

Launched directly from modified shortcut on desktop with this command line and OpenXR Toolkit running, F:\DCS World OpenBeta\bin-mt\DCS.exe" --force_enable_VR --force_OpenXR, runtime shows as OpenXR

Still launches Steam VR, same symptoms as with F:\DCS World OpenBeta\bin-mt\DCS.exe, slightly better performance, I think because of OpenXR Toolkit.

Log shows this

2023-03-10 20:46:20.932 INFO APP (Main): Command line: "F:\DCS World OpenBeta\bin-mt\DCS.exe" --force_enable_VR --force_OpenXR

2023-03-10 20:46:20.932 INFO APP (Main): DCS/2.8.3.37556 (x86_64; MT; Windows NT 10.0.19045)

2023-03-10 20:46:52.517 INFO VISUALIZER (Main): LAUNCH IN VR OpenXR: SteamVR/OpenXR : oculus

 

dcs.log_3_12_2023_1811.txt DxDiag.txt

Edited March 13, 2023 by Pnguin9999
Forgot to include system specs and remedies tried.

[Pnguin9999]

Update. I have tried a few new things and they worked. Now getting 35-45 smooth FPS in Caucasus even when dropping a pair of CBU-97s. I removed MSI Afterburner and Riva Statistics, turns out the Zotac 3060 TI OC card standard advertised boost clock of 1695 MHz will actually go to 1920 if well cooled (65-75C) using a program called fan control to run the GPU fans on a custom curve. 75 % RPM at 70C, I'd rather buy fans than cook my card. The Zotac will boost until it hits the voltage limits in the VBIOS. Second, I use Process Lasso and set CPU priority always for DCS, Virtual Desktop and Steam to high. Probalance and high performance on. Restricted DCS to physical cores only.  Panjno on Youtube has great videos on how to set this up. Finally two things I got from posts in this thread. Turned off audio streaming in Virtual Desktop and used separate headphones from the PC and changed the registry " Set HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenXR\1\ActiveRuntime to None" thanks Hillman! So starting DCS from the VD tray icon using bin_mt.exe starts in Oculus runtime now, no Steam VR.