is it bad objects and texture optimisation of game or is it something else?

[Truelore]

Is it bad optimisation of some planes / choppers / localisations. I found, that same graphic settings works different with different planes / choppers. In example at KLAX airport with Chinook or Cessna Citation CJ4 game is very laggy (stutering) but same graphic settings (higher, some ultra, some low) with Airbus 125 and same KLAX airport works well (thanks to Virtual Desktop). In this case game works 42 fps up to 62 fps with 90 Hz on RTX 3080 12GB - Oculus 3. Virtual Desktop has to be set on VDXR H.264+ Codec without automatic bitrate and boost game priority. Graphic quality set on Ultra with video buffering. SSW on automatic or try to set on constant. 500 Mbps.
I dont know if game 2D setting matter but i set them on low.

My game VR settings

1) level of terrain detail - 400
2) pre-buffering - medium
3) mapping - off
4) buildings - high
5) trees - high
6) rocks - high
7) grass - high
8) level of detail of objects - 200
9) volumetric clouds - High
10) texture res. - ultra
11) anisotopic filtering - 8x
12) supersampling - off
13) water - high
14) shadows based on ray tracing technology - off
15) shadow mapping - 1536
16) ground shadows - 512
17) contact shadows - high
18) windbreak effects - high
19) Ambient occlusion - ultra
20) reflections based on cubic maps - 256
21) reflections based on raymarching - ultra
22) light beams - high
23) the rate of refreshing the glass cockpit - high
24) character quality - low (stutering often start but not allways when you look at the co-pilot's figure if not game works well)
25) traffic quality at the airport - low
26) air traffic - low
27) traffic - high
28) sea ​​traffic - low
29) fauna - high

DLSS game (quality) is set on 3.8.10.0 (with DLSS swapper program)
AMD fidelityFX Sharpening - 110
reprojection mode - depth
NVIDIA reflex low latency - On + boost
dynamic settings - is set on 30 fps

NVIDIA drivers 566.14 https://www.nvidia.com/en-us/drivers/details/235904/

Above settings works well to me from KLAX airport and with Airbus 125 chopper with Virtual Desktop. Make sure the game is newly launched.
Is it a problem of DX 12 ? MSFS2020 was fine with high or even ultra (DX11)

[ждун]

You should not expect settings of FS2020 have similar performance impact in FS2024. Some are quite different. For example ultra clouds and ambient occlusion were performance killers in 20, but in 24 not at all, those have very mild impact on performance. However Terrain LOD still has the haviest performance impact.

Check out this video comparing visual quality and performance impact differences for each of the settings.
https://www.youtube.com/watch?v=NOPUpKU8i9s

Looking at your settings LOD 400 looks like not optimal. It will also likely overflow 12GB Vram and hence suddenly cause severe performance break down.

In my opinion this is not really worth it in VR. This is nice when you play panecake in 4k resolution. But with LOD 400 in VR, you won't notice much of a difference compaired to say 150 but it will significantly affect the performance.

I would rather favor supersampling beyond native resolution of the headset over the Terrain LOD. This costs performance, but it makes everything less blurry, more clear and sharp. Makes tiny text on the instruments actually readable and also distant terrain more defined.

My recomendation is consider trying this:
Frist set Terrain LOD to no more than 150. I would start with 100 and increase a little bit in the end if you end up with some overhead.

Use DLSS Performance mode. Not quality, but performance.
It will render at half of the native resolution and give you significant performance boost. However it will also make everything messy and blurry.
Now you can counter this by supersampling beyond native resolution. You can do it with OpenXR toolkit, by overriding the final resolution. With DLSS performance try 170% and if it goes well you can try increasing to up to 200% of native resolution. Oculus 3 native is 2064×2208p. So override it to 3506x3753 which would be 170% native. You should notice much better image quality and perhaps also better performance.

What happens here is that your GPU in fact is rendering at half of that resolution, but DLSS then upscales it to 170% native using AI voodoo actually producing very good results. This upscaled high res image then is sent to the image buffer of the headset, where it is downscaled to native again by the headsets firmware. However this still results in much better quality compared to rendering directly in native.

[Truelore]

Thank you for your answer. Everything you wrote is OK, but that's not what I meant (I have changed topic). I think you're talking about SteamVR settings. I currently use Virtual Desktop and VDXR. The OpenXR toolkit seems to make the situation worse. VDXR works best for me at the moment. The point is that the same settings make a huge difference in different situations. For different aircraft and locations. Sometimes the same settings give very good performance, sometimes the opposite. For example, Cessna Citation CJ4. Sometimes even looking at the co-pilot (at the KLAX airport, as I have already mentioned) causes the system to jam for a long time. You don't look at him, it works better. Sometimes it causes the game to close or the virtual desktop to freeze. The Airbus 125 works well in the same location with the same settings. Clouds have a big impact on my system - low vs ultra, but even without them, looking around in VR at different locations or planes clogs the flow.
LOD affects the amount of detail, not its quality. I can of course set it to 150 or lower, but when I fly I like to watch the scenery. In MSFS 2020, these settings affected render distance, not quantity. I have almost everything there to the max. In MSFS 2020, DX12 was killing the game for me - stuttering. On DX11 everything was fine.

[Ludo]

Hello,

I play VR to with quest 2 and virtual desktop and have 100/120 fps in game but better graphic card (rtx4080s).
If u have some stutter in game u need to have low bitrates in vd.
I try many times and the better for me was 60 Mb in streaming settings (with my 2080s 70fps medium/high settings in game) .
Try this and check ur fps in game ;)

Good luck and good fly :)

[Truelore]

Probably you're both right. The virtual desktop changes resolution depending on the graphics card selected in the settings. I set it to RTX 4090 and, as I wrote earlier, in some places and settings it performs very well at high fps. If you choose the RTX 3070 setting, the graphics will look bad but the performance will be better even on Cessna Citation CJ4 at KLAX, but despite what I said above, this setting may also cause the game to freeze or stutter (on Virtual Desktop) or maby game and Virtual Desktop needs to be restarted... I think it's about finding the sweet spot for your computer. The graphics card is very important in MSFS 2024 for DX12 purposes but I think the poor optimization of in-game objects also makes a big difference, which is why it performs better with some planes/helicopters and worse with others (at same localisation ofcourse).