SteamVR Motion Smoothing – should you use it? // GamingWithMatteo311

hello everybody and welcome back as always I am Matteo 3-1-1 and today we’re talking about steamvr motion smoothing what is it how does it work and should you be using it there will be timestamps in the description if you want to jump around to any specific part of this video so if any point in this video you’re following the information useful maybe consider giving it a thumbs up subscribing you have questions leave them in the comments I will answer them so first of what is steams be our motion smoothing well this is a software method to create extra frames for when your GPU just can’t keep up with the workload to give you an example if your valve index is set to 120 Hertz it is trying to produce a frame every 8.3 milliseconds so your GPU is trying to produce one frame every 8.3 milliseconds and if it cannot keep up with the workload Steam’s motion smoothing will kick in so that you are getting a consistent 120 frames on the LCD screen it is still refreshing with new frames however your GPU will not be making those 120 frames some of them in this case where motions more than half of them will be faked now you may be familiar with motion smoothing technology from things like TVs however it’s not quite the same and steamvr x’ motion smoothing is more advanced with motion interpolation every TV has a different name motion motion plus I think for Samsung again this is the creation of artificial frames in between now if you’re thinking about that and you’re saying wow I know that technology it’s horrible I would never do that to myself well just know this is this is very different for VR one old footage for TVs is filmed in 24 frames per second that is a very low number and then when they want to fill a gap of 24 to a hundred and twenty that’s when these artifacts are extreme and you have what’s known as the soap opera effect you may be familiar with it motion interpolation can make every TV show look like it’s filmed on crappy low budget cameras aka a soap opera so if you think motion interpolation overall has a bad rap well it’s kind of justified when it comes to TVs and I would always shut it off on the TV but when it comes to VR I would always keep it enabled it’s going to look at previous frames and determine your head position from data it has the direction your head is moving in and it’s gonna extrapolate based on that information and create a new frame to buffer in between the missing frames now this is very important in VR because an inconsistent frame rate may lead to things like motion sickness your actual physical movement in the VR world may be marred it can feel jarring or unsteady which some people just cannot handle oculus has a similar application their version is known as time warp instead of motion smoothing and its end goal is the same but the way it does it is completely different steamvr motion smoothing is going to drop your frame rate in half so if your machine is trying to produce 120 frames and it cannot keep up it’s going to drop at the 60 and every other frame is going to be faked so you get 120 frames per second the load on your dream you will significantly drop because it’s not trying to do 120 anymore it’s saying that’s not possible let’s give up let’s just do 60 now time off instead of chopping your frames in half it’s gonna try and just fill the gap so if you are playing a game your oculus headset is running at 90 or 80 Hertz and something happens the game a major explosion and all of a sudden your fps tanks time warp is gonna say okay we’re not producing 80 or 90 frames per second anymore we’ve dropped down to 61 oh no I need to create 19 frames or I need to create 29 frames to fill in that gap so it is a variable rate at which it will create new frames this works very well in some situations the pros and cons and there are pros and cons on both sides time warp first motion smoothing motion smoothing works consistently over an extended period of time so it is a more consistent result both of them come with artifacts and other issues time time warp is good for shorter intervals so a game runs pretty steady but there are these moments where there’s tons of particle effects and you take one quick hit and you bounce back that’s when it kicks in and that’s when it works the

best possible and again both of these technologies are intended to keep the actual motion your physical motion fluid because if you have a jarring effect or a lack of frames in the headset like I said it leads to things like motion sickness so this sounds like a Silver Bullet fix all the problems but it’s obviously not this is just one method of helping problems we know exists one thing it does fix is it allows the lower end hardware to make VR playable now it’s not ideal to be running motion smoothing all the time and that’s actually where this conversation started from people ask me why I have motions moving enables with a 20 atti and then 9900 Kay I shouldn’t need to use it now my scenario I have it turned on which I will go into later but it almost never kicks in now I’ve put together some footage which should show an example of what actually happens with motion smoothing on and motion smoothing off this may appear a little exaggerated the method I captured it is to accentuate how this actually looks and you’re gonna see I’m using Moss from my example here and you’ll see me turn motion smoothing on and off and you’ll see the difference in frames per second you’ll see with motion smoothing on when it turns on I turned off my super sampling pretty high to get Moss to just be my machine up I just happen to be playing moss it’s great game but so I set super sampling really high light to push my machine a little bit further than it can go to so motion smoothing kicks in and you will see my GPU is only producing 60 frames per second the percentage of utilization on my GPU is not a hundred percent it’s dropping down to like 60 70 percent overall the game still looks very fluid feels very smooth however you may see some artifacts with quill the character in the game and this generally happens when you were moving both your head and the character at the same time and this is known as shudder now why this may occur is because these frames are being faked and while steamvr has a lot of information on the direction that your head is moving in and the expectations of where it’s going to be going based on previous frames it doesn’t have information on what the character in game is going to do so again it has to a make a frame that approximates that character’s next movement so if you’re moving a character around erratically you’ll see what’s known as jetter and it can almost look like a blurring around the character or as if the character is slightly in two places at once however moving around physically in a VR world seems pretty seamless you don’t feel any affect you don’t really notice that motion smoothing is on the overall impact to what can only be described as the presence or sensation of being in VR is not impacted except with the Edit occlusion of these artifacts now when I disable motion smoothing you will see that my GPU usage will go back up I am creating more frames and I’m now in the hundred to one hundred and ten frames per second range and while you might think okay you’re producing more frames you should have a better result this should be a better experience more frames is better the new standard for actually smooth gameplay is frame timing we really want consistent frame timing when the frames are coming in at the perfect interval that’s when you get a butter smooth the game and I can immediately notice where motions moving turned off that when I stopped moving my head around in this environment it’s a bit jarring and a few minutes of this I actually felt a little V our motion sickness I wouldn’t call it sickness and maybe slight VR disorientation I I didn’t like it now in an ideal world your GPU would produce the 90 or 120 frames per second at the exact same intervals and everything would be perfect but we know that just does not happen having this option for your machine to enable motion smoothing in those moments when it needs it to help prevent any type of impact on your overall experience I think it’s a great tool there’s a reason why steam has invested time and effort into producing this and so has oculus now this technology also allows lower end hardware to be able to make VR playable yes you really much rather be producing the 80 90 120 or 144 frames that you need for the refresh rate on your HMB that’s ideal but if you don’t have that option you don’t have that budget for a $2,000 computer or whatever it may be

this makes a lower-end vr gaming possible and with my experience with motion smoothing I think it is completely playable even if you were playing with motion smoothing enabled the entire time now on the opposite end of the spectrum if you have a very beefy machine well this allows you to crank up the graphics turn up the super sampling and know that if your FPS takes a hit and tanks you’re not gonna suddenly feel like someone punched you in the gut in the VR world because your head movement is just not being tracked appropriately and you won’t have that VR disorientation so overall should you be using motion smoothing personally I keep it enabled for all games at all times but you might not want to and here’s why if you happen to be running certain games where there are a lot of moving characters at one time the overall amount of artifacts that you can see with motions moving on may just be a game ruler especially if your FPS is dropping significantly lower than what it should be I’ve heard scenarios where VR chat runs horrendously and if you have motion smoothing on you’re just gonna be seeing nothing but artifacts the artifacts get worse obviously the lower your FPS goes because then the system is gonna start cutting it in half again and producing so many more fake frames that you’re gonna get artifacts all over the place and it will most likely completely ruin the experience overall though this may come down to you and your personal preference now this video actually came about from questions I’ve been receiving on some of my other YouTube videos asking about motion smoothing and the youtuber and also twitch streamer hey you guys well I’ll put a link in the description you go check him out he’s nice guys been leaving me lots of comments but he had a lot of questions around motion smoothing and I said you know what this is actually a topic for discussion so let’s make a video and let’s get it out there so quick shout out to him thank you for the idea but he said I’m getting much better performance with steamvr motion smoothing turned off and I want better performance personally you may be producing more frames but overall I feel like the experience is highly impacted and I think you’re better off tweaking your settings so that you get a steady framerate and motion smoothing turns on rarely if ever and and you might want to adjust this on a game by game basis now I use and you saw in this video FPS vr this allows you to adjust your settings on the fly and that’s what I recommend you do it’s gonna allow you to see your actual stats of what’s going on in the game how many frames you’re producing is motion smoothing turned on this is gonna give you a little idea so you you know like you may be able to feel a difference you may not some people are way more susceptible to this than others and you could go and turn motion smoothing whatever you want and see how that impacts the games that’s what I think the ideal situation is to just go buy the super cheap program and turn it on and off or just experiment and go through your settings and save this game I want this setting this game I want this but my overall recommendation is just to tweak your games on a game by game basis and get that consistent frame rate you want and there might be momentary scenarios whether you FPS drops and I would let motion smooth and kick that up so you don’t feel that jarring effect than VR that is my personal opinion I hope this video helped you guys and as always guys I hope you enjoyed this video I will see you on next time you