Relativty: An open-source VR headset for $200

(relativty.com)

156 points | by LorenDB 4 hours ago

13 comments

  • jsheard 4 hours ago
    From the GitHub this is only capable of 3DoF tracking, which puts it in the same category as the defunct Oculus Go headset, or Google Cardboard. 6DoF is really the bare minimum to qualify as proper VR nowadays.

    For the uninitiated 3DoF means the headset only tracks the rotation of your head, not your heads absolute position as you move around, while 6DoF tracking does both. 6DoF is also much harder to implement.

    • chii 3 hours ago
      3dof is sufficient, imho, for a large number of VR use cases, because most people don't have a full room dedicated to it, but is at a desk. Sitdown VR setups would be more common, if the equipment was cheaper.
      • LorenDB 3 hours ago
        Having experienced both 6DOF and 3DOF on my Quest 3, I can confidently say that 6DOF is leagues ahead even if you are sitting in a chair. Unless you are watching a 180° stereoscopic video, you'll want to look around to get the full experience, and even the small translation movements that result when you turn around can make the experience nauseating.

        Besides, VR is already cheap. A new Quest 3S is just $300 and can do pretty much all of what the $3500 Vision Pro can do (just worse); if you just want VR games you can get used 6DOF-capable PCVR or PSVR headsets on eBay for closer to $100.

        • jachee 2 hours ago
          > Quest3S … pretty much all of what the … VisionPro can do

          It can’t do that “protecting your privacy” thing. And that’s a dealbreaker for many, many people.

      • Tarks 2 hours ago
        Also have to hard disagree. I remember going from the Oculus DevKit2 to the Vive, seeing the change in people we'd invite over for "I'm done trying to convince you with words just Come over and try out VR" evenings.

        6DOF, even when sitting, is a significant difference. Your brain immediately feels far more at home with good 6DOF.

        Fun fact : one week I spent about 5-6 hours every evening playing Elite Dangerous in VR. Mining asteroids while listening to lofi cyberpunk and pretending that mining was my whole life, it was great. Until my partner would bop me on the back of the head ^_^

      • dmarcos 2 hours ago
        6DOf not only necessary for room scale. Lack of parallax of 3DOF a common cause of discomfort for many. I’ve been in the space for a decade and given hundreds of demos to people.
      • atrus 3 hours ago
        I very much disagree, your view in vr tracking your head as it does small movements in xyz significantly increases immersion, and more importantly, significantly decreases motion sickness and fatigue.
      • koolala 55 minutes ago
        Close one eye and those sound like TV use cases.
      • zombiwoof 1 hour ago
        They also said their mission is for creators. Seems to me 3D is fine for that
    • aziaziazi 3 hours ago
      Never understood why my GCardboard couldn’t do that, my phone sure has a bunch of accelerometers and giros. Sure higher and other techs can track better but isn’t it enough for a basic sense of mouvement? For most of the applications I won’t more than a few meter anyway.

      Probably some have tried and I’ll be curious to know what prevent it.

      • jsheard 3 hours ago
        The problem with accelerometers and gyros is they drift badly if you try to derive absolute positioning from them alone. They need to be fused with some other form of tracking to anchor them in absolute space, which in the case of the Quest and Vision Pro is done with multiple outward-facing cameras fed into a SLAM algorithm.

        Maybe Cardboard could have attempted to use the phones camera for SLAM, but a single lens would only have got them so far. Dedicated VR headsets have at least four cameras pointing in different directions, which are sometimes augmented by IR projectors and/or LiDAR.

        • bee_rider 2 hours ago
          Most phones have a couple cameras nowadays… I think the Pro iPhones (some, at least) even have some sort of lidar system that seems like it ought to be helpful? Anyway, it is a shame, I guess the market must not have been there.
          • Joel_Mckay 1 hour ago
            Most phones use a rolling shutter, so doing machine vision for low-latency motion/pose is difficult or unfeasible on a mobile cpu.

            Best regards =3

        • bigiain 54 minutes ago
          Lots of quadcopter flight controllers use 9DOF IMUs , with 3 gyros, 3 accelerometers, and 3 compasses. The absolute directional data from the compasses solves (at least most of) the angular/gyro drift.

          The translational drift is harder for VR/AR headsets indoors. Drones can do sensor fusion with GPS and the accelerometers to solve translational drift from the accelerometers (or, for FPV drones, they just let the meatware compensate).

        • Joel_Mckay 1 hour ago
          LADAR/3D-cameras or LIDAR are both expensive parts with limited capabilities. Note rapid pose-recovery using cameras and or SLAM has been tried, but again people end up pooching the CPU/power budget.. and rolling camera shutters are useless... difficult to deploy as a wearable tech.

          A few years back, we did design a set of <160USD parts to get repeatable absolute head and controller spacial location/pose to sub +-3mm in a room. The key was being able to resolve stable _absolute_ pose at >24Hz with <10kiB/s of low-latency data to handle. i.e. a small generic mcu _quickly_ handles the dual kalman filters and IMU sensors fusion, and battery life is reasonable.

          Now build your own versions, it is not that hard... ask Alphabet/Meta/Apple... lol...

          Those new 3D lenticular screens look pretty cool, but the prices are still not for consumer hardware yet.

          Best of luck =3

      • foobarbecue 3 hours ago
        Dead reckoning using MEMS IMUs accumulates error way too fast.
        • adgjlsfhk1 3 hours ago
          even if you supplement with GPS?
          • jsheard 3 hours ago
            That works if you're building a cruise missile, but not so much if you need millimeter accuracy indoors.
            • aziaziazi 3 hours ago
              Ah! So it could 6DoF if I run outdoor fast enough with MarathonSimulator
      • nox101 3 hours ago
        especially given the camera, it seems like you could do some kind of motion tracking. I guess a Quest has 4 cameras for motion tracking so 1 isn't enough. Though maybe putting a 180degree wide angle lens over it would let it do the work for 4?
  • webprofusion 3 hours ago
    This was 4 years ago. The team has now become https://unison.co/
    • gpm 3 hours ago
      Founded 2021, part of YC in 2022, any news on how the product is shaping up?
  • dang 3 hours ago
    Related. Others?

    Relativty – An open-source VR headset - https://news.ycombinator.com/item?id=24431052 - Sept 2020 (222 comments)

    Relativ – A VR headset that you can build yourself for $100 - https://news.ycombinator.com/item?id=16195055 - Jan 2018 (84 comments)

  • paxys 4 hours ago
    It isn't a $200 headset. It's a headset you have to build yourself (including 3D printing and soldering) with $200 worth of parts. Huge difference between the two.
    • nicce 4 hours ago
      It depends. Do you have paid extra work for the time you would use on building this?
      • KPGv2 2 hours ago
        Everyone who is capable of building this thing has the option to take on paid extra work doing /something/, even if it's tutoring rich college brats in calculus at $50/hr.
        • nicce 2 hours ago
          I wish that would be the case.
      • manfre 2 hours ago
        All of our time has a value.
        • nicce 2 hours ago
          That is true. But only specific kind of time can be used on acquiring the desired VR headset with specific time/value ratio.
      • vdvsvwvwvwvwv 2 hours ago
        Yes
  • Animats 2 hours ago
    Here's an overview of current VR hardware.[1] This is by Phia, who is a VR native. She's been trying everything in VR since she was a teenager.

    The most recent advance is Bigscreen.[2] Wired headset display, weighs 127 grams, good screens and optics, about US$1000. We're starting to see the end of the brick you wear on your head era.

    [1] https://www.youtube.com/watch?v=DomfNq0vNCk

    [2] https://www.bigscreenvr.com/

  • Zamiel_Snawley 4 hours ago
    Edit: I now realize that it is actually relativty, without the second ‘I’

    The relativity.com domain could not have been cheap, even if leased.

    I’m surprised they are making a new brand, “Unai”/unison.co, instead of continuing with Relativity.

  • interstice 3 hours ago
    Clicking through the parts list, somewhat wildly <10cm inch 2k displays appear to be available for <$50 now. After a quick look I can't find much north of that in terms of resolution, but surely there has to be _something_ between this and the SOTA 4k+ displays going in high end headsets. If those exist then the last major barrier I can think of to DIY is the magic lenses required to make those screens viable when <50mm from an eyeball.
  • LarsDu88 3 hours ago
    That company name is not easy to remember how to spell.

    This will be nice for Maker projects, but I don't see it getting traction without 6DOF

  • DarkmSparks 4 hours ago
    probably better buying a psvr for $150... Great quality headset with solid linux support.

    love to see more quest 3s hacking tho ($270)

  • accrual 3 hours ago
    Defeat the Index in some metric and get support from VRChat and I'm in 8)
  • nashashmi 4 hours ago
    I feel like the future would declare monitors to be old technology. And everyone will migrate to eye mount displays.
    • Zamiel_Snawley 4 hours ago
      That’s kind of my dream for programming actually.

      A belt-mounted split keyboard on my thighs, and limitless screen space in a serene setting provided by VR. Won’t need a standing desk at all!

      • grugagag 3 hours ago
        Sounds dystopic to me. I don’t always look at the display when typing. Having no way to look away is visual prison to me.
        • jannyfer 1 hour ago
          Nowadays you can have a floating display in AR that stays in the same spot, as if it’s a physically grounded monitor. You can look away and it stays where it is.
        • bogwog 3 hours ago
          > Having no way to look away is visual prison to me.

          This makes the advertisers happy.

  • andrewmcwatters 4 hours ago
    It's too expensive. The Meta Quest 3S is $300.
    • nicce 4 hours ago
      Is it possible to use it these days without Facebook account.
      • procone 2 hours ago
        Yes, you use a meta account that has no ties to Facebook. Mine is under an alias with absolutely no connection to any social feeds or network.

        Unless you count Meta Horizon Worlds which is kind of a joke.

      • paxys 3 hours ago
        Can you use any device these days without creating an online account?
        • nicce 3 hours ago
          My monitor does not require online account yet - I don’t see why my VR classes should either.
          • paxys 3 hours ago
            Quest headsets aren't monitors and don't get their input from a computer. They are standalone devices with a consumer OS and app store, much like your PC or smartphone.
            • nicce 2 hours ago
              I wonder how it is then mentioned in this context. It is not comparable at all.
  • jckahn 4 hours ago
    The name of this product is infuriating.
    • pteraspidomorph 4 hours ago
      Oh boy, I didn't even notice until I read your comment!
    • garyfirestorm 4 hours ago
      Nvm I see it now

      Why is that? I don’t see any problems with this particular name. Valve index and oculus rift aren’t that amazing either.

      • LorenDB 4 hours ago
        The name is Relativty, which is one 'i' off from the normal spelling of relativity.
    • alluro2 2 hours ago
      "RelativityVR" or similar would arguably be equally good for search, clearer purpose/context from the get-go, and much easier to communicate, vs " 'Relativity', but without second 'I' " ...
    • esafak 4 hours ago
      It's more searchable?