WMR Motion Reprojection Mode?

[Razi]

Maybe someone here can help me with this issue. I've come up empty after hours of tinkering and testing.

 

I have a Lenovo Explorer and the issue is that when DCS runs at 90 or 45 fps the experience is nice and smooth. Obviously if it drops below 45 fps the experience begins to suffer. However, I also find that the experience begins to suffer when the fps goes above 45 but below 90 bouncing around between 55-75 fps. I'm not sure how it works, but at some point something (WMR, SteamVR, DCS??) turns off and allows the fps to go from the locked 45 to something between 45 and 90. I would like this to stop happening and preferably I would like to have 90 or 45 fps and nothing in between.

 

However, maintaining 90 fps just isn't doable for my system, so I'm thinking that if there was someway of forcing WMR (maybe SteamVR or DCS?) to always use 45 fps that would mean that I could then adjust DCS ingame settings to allow for some headroom so as to maintain 45 fps most of the time.

 

I thought that "motion reprojection" in the WMR for SteamvR settings would do the trick, but it doesn't seem to do anything no matter what I've tried from hours of research. I definitely could be missing something, which is why it is time to make a thread.

 

Anyone have any ideas?

 

I'm using SteamVR beta 1.11.10, Windows 10 Pro 1909.

 

I have tried manually editing default.vrsettings for WMR for SteamVR and turning motionreprojectionmode to auto or motionvector but neither has any effect on DCS. I've tried this with motion smoothing in SteamVR on and off. I've tried forcing motion smoothing always on in SteamVR per applications settings for DCS. I've tried the legacy option in this window as well.

 

Thanks for any help or ideas

[The_Nephilim]

can you post the line from default.vrsettings for motion reprojection??

[Razi]

Sure, here is the whole file:

 

{
   "driver_Holographic" : {
   },
   "driver_Holographic_Experimental": {
       // Motion reprojection doubles framerate through motion vector extrapolation 
       //     motionvector = force application to always run at half framerate with motion vector reprojection
       //     auto         = automatically use motion reprojection when the application can not maintain native framerate
       //     disabled     = turn off motion reprojection
       //
       // Comment out or remove this line to use the SteamVR settings for controlling motion reprojection
       "motionReprojectionMode" : "motionvector",

       // Motion reprojection indicator to display the mode currently selected
       //     green = off because application can render at full framerate
       //     cyan  = on because application is cpu bound
       //     blue  = on because application is gpu bound
       //     red   = off because application running at less than half framerate or motion reprojection disabled
       //
       //     green + cyan + blue = motion reprojection half-framerate mode or application requested motion reprojection
       "motionReprojectionIndicatorEnabled" : false,

       // Motion indicator size and position in 0-1 space
       "motionReprojectionIndicatorSize": 0.015,
       "motionReprojectionIndicatorXPosition": 0.3125,
       "motionReprojectionIndicatorYPosition": 0.3125,

       // Some people may experience increased discomfort such as nausea, motion sickness, dizziness,
       // disorientation, headache, fatigue, or eye strain when using thumbstick controls in Windows Mixed Reality.
       //
       // Setting thumbstickControlsMoveEnabled to true may cause application compatibility issues
       "thumbstickControlsTurnEnabled": false, // true = use thumbsticks for artificial turn, false = default application thumbstick behavior
       "thumbstickControlsMoveEnabled": false, // true = use thumbsticks for artificial move, false = default application thumbstick behavior
       "thumbstickControlsReversed": false,
       "thumbstickTurnSmooth": false,
       "thumbstickDeadzone": 0.25,
       "thumbstickUseForSystemMenu": true,

       // During some transitions (typically entering Home), controller events start accumulate and the system has difficulties to catch up
       // Settings a mximum age for a contoller input allows ensuring that the events queue does not grow indefinitely
       "obsoleteStateMaxTimeInSeconds": 1.0,

       // Disable DX12 support
       "forceDisableDX12": false,

       // Feature still in development
       "enableSkeletalInput":  true
   },
   // If motionReprojectionMode is disabled, these applications will still respect SteamVR settings
   "MotionReprojectionDisabledExceptions" : {
       "hlvr.exe" : true
   },
   "NoInterEyeRotation" : {
       "battlezone_dx11.exe" : true,
       "battlezone_dx12.exe" : true,
       "DOOMVFRx64.exe" : true,
       "Fallout4VR.exe" : true
   }
}

 

edit: As an aside, I have tried with "motionReprojectionIndicatorEnabled" true or false.

[Razi]

I discovered there was a public beta for WMR for SteamVR and installed it and that did it. Changing motionReprojectionMode to motionvector in the beta actually locks fps to 45.

 

This works the way I hoped and anticipated and it definitely makes a huge difference for my system.

[imacken]

Here is a post I made a while ago relating to everything I knew about this. See if it helps.

https://forums.eagle.ru/showpost.php?p=4251157&postcount=5176

[Quekel]

I set my WMR to 60hz and with motionvector enabled it remains a solid 30 FPS and you can up the settings

[imacken]

I set my WMR to 60hz and with motionvector enabled it remains a solid 30 FPS and you can up the settings

 

For me, the flickering at 60Hz is unbearable, and 30 is way too low for a decent experience.

[Gunnars Driver]

For me, the flickering at 60Hz is unbearable, and 30 is way too low for a decent experience.

 

Exactly.

 

 

But to those that doesnt have any problems with that; Congratulaions ! That’ll save a lot of money on H/W.

[Razi]

Here is a post I made a while ago relating to everything I knew about this. See if it helps.

https://forums.eagle.ru/showpost.php?p=4251157&postcount=5176

 

Thanks! That is a good guide and glad someone took the time to write it out as that is pretty much exactly what I discovered, eventually.

 

I also tried 60hz, but there was flicker and the screen seemed to lag with head movement - I could see the black borders as I moved my head. Colors seemed slightly dimmer and the rendered resolution seemed less than 100%, I could easily see the black edges of the screen.

[Quekel]

For the best experience using 60Hz, you need to download the updates from the windows insider program wich provides the latest WMR drivers.

 

There you can select 60hz and maintain the quality of 90Hz

[Quekel]

[imacken]

For the best experience using 60Hz, you need to download the updates from the windows insider program wich provides the latest WMR drivers.

 

There you can select 60hz and maintain the quality of 90Hz

 

How is that even possible?

[Gunnars Driver]

How is that even possible?

 

Its not.

 

Maybe refering to the settings, like Graphics. The smooth gaming wont be there.

 

One possible solution could be getting a solid 60fps ( = never reprojection@30fps) instead of 45 with frame reprojection. It could be better if you can stand the 60hz flicker.

[Baldrick33]

Are you saying that is different to the option we have always had in WMR?

[Baldrick33]

After a bit of digging it seems the the normal experience option of 60Hz also turns off some other stuff - lowering resolution and fov to improve performance.

 

The Insider version allows you to select 60Hz without affecting the other stuff. Unfortunately I believe this means the horrid (for me) flickering doesn't go away.

 

https://forums.mudspike.com/t/vr-news-wmr-news-2020/9634

[imacken]

After a bit of digging it seems the the normal experience option of 60Hz also turns off some other stuff - lowering resolution and fov to improve performance.

 

The Insider version allows you to select 60Hz without affecting the other stuff. Unfortunately I believe this means the horrid (for me) flickering doesn't go away.

 

https://forums.mudspike.com/t/vr-news-wmr-news-2020/9634

 

Exactly, it's still 60hz no matter what else is going on!

[Quekel]

Yeah its not perfect, but iam able to fly with a solid stutter free 30FPS, i prefer that then having stutters.

And i can increase visibility and PD more for better quality

Edited April 21, 2020 by Quekel