Motion Blur / Ghosting on black objects

[Lirezh]

Anyone else noticing a motion blur when moving the head ?
I just wonder if this is new due to some system changes or if I just always ignored it.

It is very present on dark objects next to bright (like the small pilot monitor above the pilot legs), if I move my head a black/violet blurring occurs while I move it.

I always thought it is low persistence not kicking in but now I can not get this gone anymore.
it runs at 75fps stable.

I had the impression that before my hardware-upgrade I rarely ever had such a smearing, when I restarted ED smear was gone.
So I thought it's a low persistence problem. Might be wrong

 

[keem85]

Hi!

Yes this is an issue with the DK2 oled screen.. Remember that this is a developement kit. But lucky for you I have a solution for it. Go to nVidia control panel, "adjust desktop color settings", choose "Rift DK2", check "Use NVIDIA settings" and then set Brightness to +35%, Contrast to 0% and leave gamma at +1.00.

This should get rid of your black smear

 

[Lirezh]

Thanks! I am gonna give that a try.

But I have more issues, I think SLI is not working properly in general.
When I turn my head around I get dizzy now, I could play for hours on single GPU.

FPS is perfectly stable, I just verified it again.

I don't know what the problem is but I do not feel presence anymore and become motion sick since using SLI.

 

[Thoemse]

SLI and VR don't work together well. Oculus keeps stating it but people sue it either way.
The problem is that SLI (and crossfire) use alternate frame rendering. Basically one GPU renders a frame while the other GPU renders the next. What we need for VR is bopth GPUs rendering the same frame (ATI used to do this when the introduced multigpu but went to afr because it works simpler).
The problem with AFR is that it creates a lot of latency meaning that while you are seing rock solid 75 FPS your headtracking is allways lagging behind. This lag is the poison of VR and will make you sick.
Until nvidia releases SLI VR you have to turn it off. I wouldn't have too high hopes considering that oculus recently stated that SLI VR is only know from a marketing slide. Nvidia never contacted oculus on this and they don't work on it together.

 

[NoshDaMinsk]

SLI and VR don't work together well.

Mmmmm - not sure I completely agree with this - some of us have SLI working without issues (and it was a process of experimentation). It makes a significant difference; in a good way and this was demonstrated when using DSR, I forgot to enable SLI - when the game launched there was definite and terrible stutter - I came out of the game, realised my mistake, enabled SLI, restarted and back to smooth graphics with absolutely no stutter / lag.....

I sometimes get a black smearing, and usually spot it in the main menu, with the spinning space station. A restart of the rift and game sorts this; for me anyway.

I would suggest that not all can get it working 'out of the box', so to speak, but it does work and work well.....

Nosh.

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Thanks! I am gonna give that a try.

But I have more issues, I think SLI is not working properly in general.
When I turn my head around I get dizzy now, I could play for hours on single GPU.

FPS is perfectly stable, I just verified it again.

I don't know what the problem is but I do not feel presence anymore and become motion sick since using SLI.

What does you NVidia Control Panel show?

Does it show SLI enabled?

Nosh

 

[gregoreuo]

Hi Keem - +1 Your nVidia settings make a huge difference - thanks for sharing

 

[Thoemse]

Mmmmm - not sure I completely agree with this - some of us have SLI working without issues (and it was a process of experimentation). It makes a significant difference; in a good way and this was demonstrated when using DSR, I forgot to enable SLI - when the game launched there was definite and terrible stutter - I came out of the game, realised my mistake, enabled SLI, restarted and back to smooth graphics with absolutely no stutter / lag.....

I sometimes get a black smearing, and usually spot it in the main menu, with the spinning space station. A restart of the rift and game sorts this; for me anyway.

I would suggest that not all can get it working 'out of the box', so to speak, but it does work and work well.....

Nosh.

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What does you NVidia Control Panel show?

Does it show SLI enabled?

Nosh

I suggest you read my reply again or read up on oculus forums or reddit.
I am not saying it wont work. I am saying it wont work without massive additional latency.
Latency is the killer of immersion and sometimes cause for nausea though.
There is no way to optimise your sli system to get around this as long it uses alternate frame rendering.

 

[Phier]

I suggest you read my reply again or read up on oculus forums or reddit. I am not saying it wont work. I am saying it wont work without massive additional latency. Latency is the killer of immersion and sometimes cause for nausea though. There is no way to optimise your sli system to get around this as long it uses alternate frame rendering.

I run SLI and have no massive additional latency. I have horrible stutter in single card mode with a 770gtx, very smooth in 770gtx SLI. I think part of the problem is we are talking subjective things, and just a huge number of variables. I also have Nvidia 3d vision, and I played a LOT of games with it without any problem at all. The 344.75 (I forget which were the last Nvidia drivers, the "good" ones for oculus) and suddenly I'm getting motion sick in a game I played for 100's of hours without a problem.

 

[Lirezh]

I do not seem to experience just lag, it's a micro judder like disortion but not the real judder.
More like on slight drugs judder

 

[NoshDaMinsk]

I suggest you read my reply again or read up on oculus forums or reddit.
I am not saying it wont work. I am saying it wont work without massive additional latency.

I did read your reply - and I know there is no intonation in the typed word, but your reply does come across as a little obtuse.

I do not need to read your post again, so perhaps you should read mine (?) - but to help you, it does work for me (and another poster by the look of things...)

No "massive additional latency" issues here either (to use your words - see, I am reading....)

Nosh

 

[Thoemse]

Everyone is different and what is good for you might not be good for others. I posted to warn people because reading your comment could lead people to buying a second GPU.
On the oculus rift dev forum we have the devs themselves stating it should not be done because of added latency. I could not find it anymore but there is a post with the exact added latency. I believe it was 33ms.
Then there is a post from an elite dangerous player with two gtx 980 who reports that with one gpu he can play indefinatly but with two he has no real low persistence and gets sick after a while eventhough he hits 75 allways.

I don't wanna downplay your setup. Once VR direct works i am the first guy in the shop to buy two 980 gtx's.
I don't claim that you get sick either. Some are prone to it and some aren't. You ARE getting additional latency though. No experimentation can change they way alternat frame rendering works.

 

[NoshDaMinsk]

Everyone is different and what is good for you might not be good for others. I posted to warn people because reading your comment could lead people to buying a second GPU.
On the oculus rift dev forum we have the devs themselves stating it should not be done because of added latency. I could not find it anymore but there is a post with the exact added latency. I believe it was 33ms.
Then there is a post from an elite dangerous player with two gtx 980 who reports that with one gpu he can play indefinatly but with two he has no real low persistence and gets sick after a while eventhough he hits 75 allways.

I don't wanna downplay your setup. Once VR direct works i am the first guy in the shop to buy two 980 gtx's.
I don't claim that you get sick either. Some are prone to it and some aren't. You ARE getting additional latency though. No experimentation can change they way alternat frame rendering works.

OK, that's fair comment - funny thing is, I have not 'noticed' any latency - all looks smooth.

.....and the funny thing is, I bought 2 970s cos my 2 670s were struggling with Project Cars - now I don't use my triple monitors for much (apart from Arma) and not played Project Cars since I have played IRacing with the Rift!

Go figger.....

Nosh

 

[Thoemse]

I should seriously should resub to iracing.

About latency.I think it is smooth since you surely never drop below 75 fps. Only your positional tracking gets delayed slightly. If that bothers you or not is dependant on every person i think. I am very tempted to get sli setup myself. If direct sli ges released i sure will buy one. My amd card (r290) is fast but sometimes a too.

Edit: do you get judder in supercruise with sli. I do get it in some systems no matter what quality settings. Annoys me a lot!

 

[NoshDaMinsk]

I should seriously should resub to iracing.

Edit: do you get judder in supercruise with sli. I do get it in some systems no matter what quality settings. Annoys me a lot!

IRacing - I really struggled with the whole pay for bits and monthly subs - being British, I like to only pay for things once; took me a long time to get over the 'pay for this track' stuff......

But no other driving sim gets an outing these days, esp with the Rift - absolutely awesome.....and I have Project Cars, Raceroom, RF1, RF2, Assetto Corsa, LFS etc etc.....

Back to ED, I do get some stutter in warp drive - looks lovely but the images always seems to be struggling to 'keep up', if you get my meaning. Once I drop out of warp, smooth and stable again.

 

[Thoemse]

Yeah iracing is something else - i dont like to pay per track either tho.
ED: Too bad everyone gets the SC stutter. Lets hope the next patch fixes it. Was ok in gamma.

 

[Marshall Fury]

But I have more issues, I think SLI is not working properly in general.
When I turn my head around I get dizzy now, I could play for hours on single GPU.

FPS is perfectly stable, I just verified it again.

I don't know what the problem is but I do not feel presence anymore and become motion sick since using SLI.

In Nvidia Control Panel

• Change the SLI mode to AFR 2
• Set your Vertical Sync setting to Adaptive

This worked for me and just about eliminated SLI lag. With SLI, the higher your frame rate, the less you will experience lag, so anything you can do to get your FPS above 75 will help.

 

[jabokai]

Hi!

Yes this is an issue with the DK2 oled screen.. Remember that this is a developement kit. But lucky for you I have a solution for it. Go to nVidia control panel, "adjust desktop color settings", choose "Rift DK2", check "Use NVIDIA settings" and then set Brightness to +35%, Contrast to 0% and leave gamma at +1.00.

This should get rid of your black smear

I tried this and it was awful - the blacks were WAY too bright! I don't know if it's down to the calibration of individual screens or what, but I settled on +25% brightness and this seems to give me my blacks back and mostly deals with the smearing.

Thanks for putting me on the path to a improved quality though.