The human eye can see individual frames when they are refreshed too slowly. 50hz is about the point where it goes from static images to moving images. The higher the frame rate the smoother the video is.
Do I, or do I not ?
- Thread starter Neo-ST
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Asynchronous space warp is an oculus designed feature which means if your framerate drops, it can insert a "best guess" of the missing frame in and draw that. in some games it is like magic, and is incredible. in elite is is not so good, so they would be your fake frames i guess.
as for why is 90 so important. Dropped frames in VR are horrible, esp if they affect head tracking (thankfully not such an issue now, in the rift at least (not saying its an issue in vive either , but i cant comment).... because rahter than just looking a bit rubbish dropped frames in vr can make you feel sick.
its less about what it "looks" like and more about what it "feels" like.
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I don't know exactly where the figure "90" originally came from (scientific studies probably) but I do know that going from say 70fps to 90fps can make all the difference with regard to motion sickness. So when I first played with my graphics settings I was pretty blasé about hitting 90 because I didn't think I could particularly tell the difference so just I wound everything up to max. But on a subconcious level ... oh boy. Driving the SRV at 70 makes me hurl but driving at 90 is fine.
And re: "real 90fps" - Oculus has this thing called ASW (Asynchronous Space Warp - catchy huh?). Basically what it does is to detect your framerate and, if your PC can't keep up with 90fps, it locks the game at 45fps and then automatically generates in-between frames to emulate 90fps. If you press Ctrl+F to show the framerate on the monitor and you see it locked at a red 45fps then you're getting fake 90, if it shows green 90 then you're getting real 90. This ASW behaviour is the default and generally works really well however you can turn it off by pressing Ctrl + Numpad 1 (and back to default with Ctrl + Numpad 4).
Edit: ninja'd by Mike, again!
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Below 90 fps, people tend to be more susceptible to VR / motion sickness, possibly when making fast motions (it doesn't appear smooth). The smoother (and lower latency) the display, the easier it is to achieve presence -- your brain is fooled into thinking what you're seeing is real.
Ideally, your GPU would be able to update the HMD fast enough to achieve that 90 fps. If it doesn't (and there'll always be occasions where you get frame hitches) the last thing you want is for your view to start jerking around. So HMD manufacturers are putting a lot of effort into minimising the effects of frame hitching. Oculus have two technologies for this: Asynchronous Time-Warp (ATW) and Asynchronous Space-Warp (ASW).
ATW came first, and is designed so that if a frame is missed, the software takes the previous frame and warps it to take into account orientation and positional changes of the HMD. So ATW is the same frame, reprojected to the new HMD viewpoint. ASW takes this concept further and performs some magic so that on missed frames, instead of reprojecting the previous frame, the software extrapolates a *new* frame taking into account movement in the scene. This includes the camera, characters, hands, etc. When ASW is active and the GPU can't maintain 90 fps, the render rate will be reduced to 45 fps, with alternate frames created through this extrapolation process. These "fake" frames tend to be pretty close but with fast movement you get artifacting.
OpenVR has something similar to ATW (called Reprojection) but AFAIK doesn't yet have an ASW equivalent.
Higher framerates do definitely make a difference, even if you don't conciously see it. Ii remember a demo on the DK2 (The Chair) where at the end you fell off a Skycraper construction site. On my previous computer that was impressive but when I went to my current computer I really felt like falling.
Wow. Interesting.
I thought everything above 50Hz (50fps) is just a waste of resources, but looks like it makes a big difference.
So basically, I should try to achieve real 90fps by looking at the fps counter, and then adjust level of details until it can maintain stable 90fps in most situations...
I thought everything above 50Hz (50fps) is just a waste of resources, but looks like it makes a big difference.
So basically, I should try to achieve real 90fps by looking at the fps counter, and then adjust level of details until it can maintain stable 90fps in most situations...
Bought my Rift 6 months ago or so - was worried I'd like it, play with it for a few weeks, but then hardly touch it again...
6 months later it's still getting used every day.
It's a game-changer - literally. Would highly recommend VR.
Top Tip: If your building/buying a new PC - don't skimp on the USB ports - you quickly use them up with a Rift !
6 months later it's still getting used every day.
It's a game-changer - literally. Would highly recommend VR.
Top Tip: If your building/buying a new PC - don't skimp on the USB ports - you quickly use them up with a Rift !
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Yup - that's exactly what I did. I also used to religiously turn ASW off (by pressing Ctrl + Numpad 1) at the start of every session (partly because the early versions of ASW did weird things when looking at station screens, strange wobbly lines and the like) but these days it's a lot better and I don't bother. I know I'm basically getting real 90 most of the time and if it dips for any reason and ASW kicks in, well, chances are I won't even notice. This is with a 1080 mind you where I reckon I really ought to be able get real 90 most of the time.
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Dont worry, even with gtx 980ti ED looks nice in VR and you will love it.
You would be hard pressed to find a Rift owner in this forum who wouldn't recommend getting a CV1. Most here are ruined for ever playing outside of VR ever again. The usual "try before you buy" recommend will often be suggested so as not to feel bad for giving a thumbs up to the rare person that cannot handle VR. That being said, many of us ordered Rift before they were available for demo, based on the enthusiastic reviews of our predecessors and have never been sorry. I bought in to play ED and DCS and these two titles alone would have been enough to make the investment worth it for me. Since then I have fallen in love with Dirt Rally and having just received Touch I can't stop playing Doom BFG VR Fully Possessed and Robo Recall. Still all thumbs with Touch right now, so "10 Thumbs Up" from this Rifter.
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Yes DCS is good in VR but very badly optimized for VR right now. I have a GTX1080 and barely maintain 40-50fps full of jitter in dogfight or over buildings. If you like aircaft flying combat I would suggest Warthunder. It is a WHOLE world more efficient in VR , my fps pretty much locked at 75fps(using dk2). The flight model in DCS is a little more realistic than warthunder though, but still if you play warthunder in sim mode it is close enough, until DCS get their act together.
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Do I or Don't I.............
I have just made John Lewis £499 richer (Less their costs of course) and will join the VR Club this time tomorrow.......Excited and scared at the same time
Excited ...... well why would you not be?
Scared...... The setup and tinkering to make it work the best it can. (Any VR setup Guru's near Southampton who fancies a few beer tokens, is most welcome to PM me.
Roll on Tomorrow, and i am dreading tomorrow!
I have just made John Lewis £499 richer (Less their costs of course) and will join the VR Club this time tomorrow.......Excited and scared at the same time
Excited ...... well why would you not be?
Scared...... The setup and tinkering to make it work the best it can. (Any VR setup Guru's near Southampton who fancies a few beer tokens, is most welcome to PM me.
Roll on Tomorrow, and i am dreading tomorrow!
I'm driving down to Southampton on Friday! Unfortunately I'm on my way to a wedding in Moonfleet (arrrggggh! pirate territory) so can't stop.
Don't worry tho - Oculus setup is dead easy. I recommend installing Dr Kaii's ED Profiler and then, depending on your GPU, copying something like the following settings ..
https://forums.frontier.co.uk/showt...STAL-CLEAR-D?p=4777257&viewfull=1#post4777257
In VR, frame rate is quite important.
In a flat monitor, you can feel the drop of frames as an inconvenient, but in VR can make you sick (literally).
A frame drop makes that you could move the head before generating the image and feel dizzy.
90 Hz is the optimum rate, but DK2 works at 75Hz, so there is a margin to work well.
In Elite, you has to equilibrate quality and frame rate, but with your machine there will be no problem.
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I know the bit you mean, my favourite too. Another really great free demo that's worth getting is Showdown.
https://www.oculus.com/experiences/rift/894396277346731/
Those two are the first things that I show to anyone who comes round for a go.
Than you Alec, i have a 1080 so will follow your guide.
Special thanks to Cmdr(s) Mad Mike, Heisenberg B.Damned and Alec Turner for their help in lightening my wallet
check you PM's regularly guys
You can tell how good VR is but how excited existing owners become when someone says they've just bought one. Frankly I just want to come round to your house tomorrow to watch your face - LOL.
Edit: errr, that sounds creepy now I read it back - sorry. [where is it]
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Excellent, now we just need to convince Neo-ST.
Edit: errr, that sounds creepy now I read it back - sorry. [where is it]
- - - Updated - - -
Special thanks to Cmdr(s) Mad Mike, Heisenberg B.Damned and Alec Turner for their help in lightening my wallet
Excellent, now we just need to convince Neo-ST.