Motion reprojection WMR

[Thuen88]

My setup is a i7 7700k and RTX 2080ti with the Samsung Odyssey +. The FPS is not able to maintain a stable 90FPS with SS at 1.5. Its jumps around from the high 60 to 90 FPS, average around 85-87. This causes a lot of micro stuttering and jittering around the stations, so i tried the Motion reprojection to force it to 45FPS. Even here the FPS is not able to maintain a stable FPS, but is jumping from 40-45 FPS which doesnt make any sense cause with Motion reprojection turn off it never reaches those numbers. With this turned on it still creates a lot of stuttering, and jittering along with artifacts.

What is going on here ? Is the Motion reprojection just that horrible with this game or am i doing something wrong here ?

 

[willisit]

What about the rest of your system? RAM? Disk? (i.e is it on an SSD?)

There are a few factors but it's worth knowing them as well. I run a 1080Ti and an ancient i7 3xxx series processor and I can keep 90fps.
Also, do you use the EDprofiler? If not, get that and show us your graphics settings - there are few things like (like AA) that you can, and should, switch off that may make all the difference.

Sorry if you know all of this!

 

[Thuen88]

16gb DDR4 3000mhz 256gb PCI ex M2 disk. Ive turned off AA and ambient occlusion. The rest is on high/medium.

What hmd are you using ? I do get 90fps stable 90% of the time, but around the stations it dips a little creating jidder and stuttering which kills the immersion.

 

[willisit]

I think everyone gets dips in stations - but I've disabled motion reproj and so if it dips, I don't notice it. 45fps is horrible...

I use both a Rift and a WMR at present. I'm waiting on the Pimax 8k with which I expect to upgrade; but I'll see how it goes.

 

[Thuen88]

I didnt get any stuttering and jitter with my Rift and my old GTX 1080ti.

Anyway my main convern was why the FPS isnt stable at 45 with Motion Rep turned on when turned of im never in the low 40 FPS , but in the high 60s in the worst case scenario ? And thats super rare. There is no point using this feature then.

 

[willisit]

That I can't answer. If Reproj comes on all I get is wavy lines and blurring - which I think is largely PC related for me (it's old) so I can't use it. I'd rather have 80fps or 60fps as I can deal with that and it still looks smooth to me - 90fps is nice, but not essential in Elite; I do wonder, given your specs (which is what i'm aiming for when I rebuild soon) why that can't deal with it even with the +s higher resolution screens. There should be more than enough power there (unless it's Elite or driver related)

 

[Thuen88]

Yes im dissaponted to say the least. Maybe im just to sensitive for this issue. I would love If future HMDs got a feature similar to GSync. That would take care of this immersion killer

 

[He$$eeTant]

I am sure youll find something acceptable but you wont get 90fps its impossible. there is a thread above/below that goes into some detail, most of us are running high end/top end overclocked gear and low res vive/rift etc and cant get the guaranteed 90fps. so find your sweet spot and wait until the future arrives.

 

[Thuen88]

On thing though. Is it possible to turn of screen mirroring in mixed reality portal ? It could be demanding showing a mirror screen in both the game on my screen and there ?

 

[Haukka81]

On thing though. Is it possible to turn of screen mirroring in mixed reality portal ? It could be demanding showing a mirror screen in both the game on my screen and there ?

Mirroring wont take 000.1 % of gpu time.

Its just same image send to monitor and vr set.

Not new render so no point.

 

[thistle]

On thing though. Is it possible to turn of screen mirroring in mixed reality portal ? It could be demanding showing a mirror screen in both the game on my screen and there ?

You should be able to switch off the mirror in the WMR portal, from memory the button is maybe at the middle bottom of the screen?

 

[Thuen88]

Okey, how do i completely turn off steam reprojetions ? Its always on even with WMR Motion reprojection turned off.

Also is there a way to eliminate that shacky/jittery screen when moving your head inside the stations when FPS is not a stable 90 fps ?

 

[CylonSurfer]

Okey, how do i completely turn off steam reprojetions ? Its always on even with WMR Motion reprojection turned off.

Also is there a way to eliminate that shacky/jittery screen when moving your head inside the stations when FPS is not a stable 90 fps ?

Motion Smoothing can be disabled globally or per game in the SteamVR settings (under Video if I recall correctly).

As for the jitter sub 90FPS, no there isn't if you turn off motion smoothing, asw etc - it is designed to smooth out sub 90FPS gameplay, turning it off stops it from doing that.

The problem with motion smoothing etc is that when it is enabled or disabled there is a slight jitter in game, so if your system hovers around the threshold where it enables / disables you can see a lot of jitter caused by it - this is often the case in stations where you FPS drop and rise depending on where you look and whats going on outside the cockpit. Your options are: Disable it and put up with the occassional bit of jitter when you drop sub 90FPS, force it on and live with the 45FPS and graphical glitches or leave it on automatic and put up with the jitter when it disables or enables. There is no perfect solution.

Personally I play with it off and put up with the occassional jitter in and around stations. There seems to be something wrong with stations in Elite, they cause FPS drops no matter your settings as far as I can tell and are in need of some serious investigation, sadly FDEV disagree and maintain that they cannot reproduce the issue that many, if not all of us see everytime we play.

 

[Thuen88]

Okey thats to bad. Its crazy that a Rtx 2080ti cant maintain a steady 90fps at all times on a 4 year old game on a resolution a bit higher than 1080p. Thats poor optimalisation

 

[CylonSurfer]

Thats poor optimalisation

I agree, it is. FDEV really don't want to do the work to fix it though. That said, there is a little more to it than simply saying that you are playing a 4 year old game at a little higher than 1080p on modern hardware. Stereo 3D puts quite an overhead on things. In the old 3D Vision days it was pretty common to assume that playing a game at 1080p in stereo 3D would roughly halve your frame rate....

 

[Sweet&Dandy]

I agree, it is. FDEV really don't want to do the work to fix it though.

Conspiracy theory... that’s why David Braben is playing down VR! :x

 

[He$$eeTant]

I am not so sure. the other big game I "play" is Xplane11, in that I force ASW always on SS @ 1.25 and run max buildings then tweak the other settings to give a really nice experience, but its no way near 90FPS or maxed out settings so really on par with Elite. BTW that's with a hefty OC on card and CPU. just think VR - done well - is tough on the system.

What slightly annoys me is claims of 90fPS making people believe an upgrade will get them to 90FPS only to go from 45fps to 60FPS and find they are no better off

 

[HeavyGroovez]

Okey thats to bad. Its crazy that a Rtx 2080ti cant maintain a steady 90fps at all times on a 4 year old game on a resolution a bit higher than 1080p. Thats poor optimalisation

On the contrary the Cobra engine is a very well optimised rectilinear render pipeline - which is what it was fundamentally designed for.

As Cylon said, you need to consider how much extra processing is required once the rectilinear texture leaves the native application domain and is passed over to the VR Api.

You are rendering per eye textures with a nominal 1.4x render scale to an intermediate frame buffer (pre distortion). This is essential because the barrel distortion effectively undersamples the central rasterization detail in the submitted rectlinear texture.

Assuming a 90hz panel refresh rate we have a frametime budget of 11.1ms. The vast majority of this is consumed by the native app calculating and presenting the rectilinear texture.

The VR Api has a tiny budget to perform the distortion operation and then actually push the data to the device.

Brute GPU compute is not going to work. You need roughly 200% of the current render power of a 2080Ti to render a scene to the Pimax within 90hz frametime with parallel projection compatibility in Normal FOV (150 degrees) inside Elites space stations. Given the year on year increase of Nvidias Ti cards is roughly 25% you are looking at years before that is possible.

Cue foveated rendering...

 

[erbse-1]

The problem with motion reprojection (lenovo explorer) is that the 45fps are undershot as soon as my 1080ti has a higher load than 72%. So 28% performance is wasted. In other games similar behavior.