Low FPS - Reverb G 2.0

[memoric]

I think it was really the Winwing export.lua file! But now my FPS are capped at 45, I think because of enabled motion vector? What are the default settings for this, to disable that FPS cap? And also should I enable "Force DX11 mode" or not?

 

Very thanks!

regards

memoric

Edited February 21, 2022 by memoric

[speed-of-heat]

well you could turn motion smoothing off, in steam VR, i wouldn't recommend it for normal flying (everyones experience is different) but i always turn it off for testing, in steam vr settings make sure motion smoothing is switched off

[memoric]

It worked! With motion smoothing on activated and not forced activated, I get now 90 FPS!

Thanks very much for helping!

[edmuss]

If you set wmr to auto rather than motion vector then any frametimes below refresh rate (11ms @90Hz) will show as 90fps and it will disengage the motion smoothing; this is your ideal because it removes the smoothing artifacts but can be hard to achieve enough overhead in DCS without reducing settings.

If you can handle the 60Hz refresh rate setting on the G2 then that will open up a large chunk of overhead to play with. You can then take advantage of the more stable image (no artifacts) or wind the settings up to max and if your frametime goes above 16ms the smoothing will keep things steady (with some artifacting) all the way up to 30ms.

edit: I was obviously too slow

Edited February 21, 2022 by edmuss

[memoric]

Well thanks for answering nevertheless :).

 

What do you mean by "If you can handle 60 Hz"? Are the 90 FPS not 90 FPS as you stated first?

 

 Sorry I'm a bit confused.

[edmuss]

You can run the wmr headsets in either 90 or 60Hz refresh rate. Essentially if the frametime is below the refresh rate (11ms for 90Hz and 16ms for 60Hz) then the image will be in synchronisation when you move your head and the image displayed will be smooth without stuttering.

For whatever reason the G2 running at 60Hz has a visible refresh rate flicker that some people are very susceptible to and find it uncomfortable. If you do find that you can ignore the flicker (I noticed it for about 20 minutes at first but can't see it at all now) then it means you can pay the settings up higher because you only need to get the frametimes below 16ms (60fps) to be perfectly smooth.

I can run mostly high settings on my 3070 and generally on Caucasus the frametimes range from 12-18ms. Note that I leave the smoothing on auto so that it keeps it smooth when frametimes do go over 16ms.

edit: for clarification, with smoothing enabled at 90Hz the fps will display as locked to 90 or 45 if you can't consistently hold more than 90. In the same fashion at 60Hz it will be either 60 or 30fps.

Edited February 21, 2022 by edmuss

[memoric]

ah ok, that's nice to know! Thanks!

I run it at 90Hz, so that shouldn't be a problem then right? Yeah I plan to set MSAA to 2x, Water to medium, and clouds to ultra like before.

[edmuss]

90 isn't a problem at all, it's the native refresh rate of the display panels which is probably why they flicker when driven slower.

MSAA Vs steamvr resolution is a balancing act to achieve your best personally perceived image quality. For me I run the G2 at 120% with vrperfkit fsr scaling at 0.75 and generally no MSAA, but that's because I'm a pauper and can only afford a mid range rig

Settings are all high apart from water and view distance on medium, clouds standard and terrain shadows flat. Looks great to me

[memoric]

Yeah. we'll see with the MSAA,

Thanks for helping!

Edited February 22, 2022 by memoric

[memoric]

So after enabling MSAA i get around 65 FPS, but I have to disable motion smoothing, but then the picture is stuttering despite the FPS. So I leave Motion Smooting on and FPS are cappet at 45. There is no other solution right, to get high FPS and Motion Smoothing on?

 

One other question:

What should I select for this? Force DX11 mode? On or Off? What does it do?

Thanks!

 

 

[speed-of-heat]

i have never seen it make a practical difference 

 

[memoric]

Ok thanks!

What about this?

vor 10 Minuten schrieb memoric:

So after enabling MSAA i get around 65 FPS, but I have to disable motion smoothing, but then the picture is stuttering despite the FPS. So I leave Motion Smooting on and FPS are cappet at 45. There is no other solution right, to get high FPS and Motion Smoothing on?

 

Thank you very much!

[speed-of-heat]

for me at anyrate, if i can't hit 90 maintain it, and i cant with MSAA , i use forced motion smoothing 

Edited February 22, 2022 by speed-of-heat

[Glide]

15 hours ago, memoric said:

There is no other solution right, to get high FPS and Motion Smoothing on?

Correct.  You can try setting the refresh to 60hz in WMR.  Motion smoothing should lock you to 30 fps in this case.  I am currently running 60hz with Motion Smoothing OFF, Visibility Range LOW.  This is the smoothest I have manged for DCS in the G2.  I can turn up all the eye candy with these settings and get perfect frames.

Edited February 23, 2022 by Glide
Clarity

[memoric]

Ok, thank you both!

[edmuss]

As above, either have 90Hz with smoothing on and lock it down to 45fps or try 60Hz and see if you can keep it above the 60fps.

Don't get hung up on the fps being locked to 45, the smoothing is interpolating the missing frames to make it up to 90 hz so that it matches the headset refresh rate (which is why it looks smooth).  Fps counters can't count the interpolated frames so it's better to use the frametimes to judge performance, 11ms is 90fps, 16ms is 60 fps.  If you can handle the G2 at 60Hz then you can really go to town with the settings and as long as your frametimes stay below 16ms you will have a super smooth, artifact free display.

In my experience, with motion smoothing off, anything below about 55fps (over 18ms) is too stuttery; I think this is very subjective to personal opinon/observation though.

[speed-of-heat]

This is a scenario I would recommend turning hags on, e.g. 60hz and motion smoothing off.

[memoric]

@speed-of-heat What do you use on Windows Mixed Reality for SteamVR Settings? SteamVR per-app setting or Motion Vector?

 

Thanks!

[speed-of-heat]

I use Steam VR Per-App Settings, like i say in my guide and then force DCS

[memoric]

ok, thank you!

[Glide]

A quick way to get to good performance is to click the VR preset, set Visib Range to Low, and Pixel Density to .5.  The only change I make is to set 60 hz and Motion Smoothing OFF in WMR and Steam VR.

Edited February 23, 2022 by Glide
Clarity

[speed-of-heat]

Resolution has no impact on VR performance… 

[Glide]

2 hours ago, speed-of-heat said:

Resolution has no impact on VR performance… 

Thanks, Speed.  First time playing with Pixel density.  LOL!

Edited February 23, 2022 by Glide

[speed-of-heat]

Pixel density, PD, does have an impact on performance, but, in a like for like number of pixels it is identical to the performance and acuity of the equivalent in steam vr. Note however that pd of 0.8 is not the same as 80% in steam vr, as they are calculated differently.PDSSCalc.xlsx shows the difference between pd and ss in steam. I recommend using only either steam vr or pd, not both this can confuse the heck out of yourself, and there is no benefit in doing so. I use steamvr it provides better granularity for controlling the actual number of pixels driven.

to put that in perspective, a PD in game of 0.5 drives the equivalent of steam vr custom resolution of 25% in terms of pixels or just under 2.5m pixels per eye with a G2 headset.

Edited February 23, 2022 by speed-of-heat

[Glide]

Yes, I prefer SteamVR CRM instead of PD for that same reason: finer control.  I'm testing 40%CRM now.  I thought it was perfect before, but now it's ever better.  Thanks again!