Fire up your GPU: VR takes hold at Nvidia's GTC 2022
Fire up your GPU: VR takes hold at Nvidia'due south GTC 2022
As all of usa who are excited about the launch of Oculus and Vive are learning, virtual reality is all well-nigh GPUs. While many PCs accept enough CPU horsepower and memory to handle a VR workload, very few accept GPUs that are upward to even the minimum suggested specs for VR playback — let lonely development. This well-nigh insatiable demand for GPU horsepower makes VR a natural area of focus for Nvidia, equally it showed at this year's GPU Technology Conference (GTC). With 37 VR-related sessions, dozens of demos, and a good portion of CEO Jen-Hsun Huang'due south keynote dedicated to VR, it was, forth with deep learning and autonomous vehicles, one of the three biggest themes at the conference.
Await at me: Heart-catching "existent world" VR experiences
Much of the excitement around VR is built using amazing demos of virtual worlds. Perhaps fittingly, virtual worlds are actually easier to portray than real worlds in VR, because it is possible to model exactly what a person would run across from whatever point of view, and with any lighting. Creating stereo views is also relatively simple — basic stereo camera support can be added in game engines such as Unity just by checking a box. Now, though, we're starting to run across full-allegiance experiences based on modeling real-globe locations. Huang showcased ii of the nearly elaborate during his keynote: Everest VR and Mars 2030.
Everest VR was put together by Solfar and Rfx using 108 billion pixels of bodily photographs, that were turned into x million polygons, which in turn drive a VR experience that is essentially photorealistic. Game-like physics are used to generate drifting snow for boosted "reality." What makes immersive experiences similar Everest much more powerful than an ordinary 360-degree video is that the user is not express to a particular location, simply can move through the environs.
Similarly, Mars 2030 is largely based on massive numbers of photographs our spacecraft have sent back from there, allowing NASA, with assistance from Fusion VR, to model eight square kilometers of the planet'due south surface. The studio then went to work enhancing the model, including creating ane million hand-sculpted rocks, and 3D versions of mile-long clandestine lava tube caves. Hoping for some star appeal, Huang brought Apple tree co-founder Steve Wozniak up on screen so we could see him be the first e'er to feel Mars 2030. Everything went well for the first couple minutes until Woz said he felt dizzy, and needed to stop before he fell out of his chair. That was definitely awkward, and symptomatic of the "queasiness" issue that continues to intermittently trouble VR rollouts.
Making fantasies seem real: iRay VR and iRay VR Calorie-free
Nvidia's iRay is the ray-tracing bundle of choice for many of the top 3D modeling packages already. This year the visitor will be extending information technology with boosted capabilities to support the unique requirements of VR. Earlier VR, producers of computer-generated video content could choose between either time-consuming photorealistic rendering, like that used for feature films, or existent-time, plausible rendering needed for interactivity in video games. VR experiences are creating a demand to reach the best of both — realistic, immersive, experiences that are high-quality, 3D, and permit the user to move around. That ways they tin can't be entirely pre-rendered. Unfortunately, moving from a 3D model to a photorealistic feel is too processor-intensive to do entirely in realtime. And then views of the model need to be rendered, typically using ray tracing to mimic lighting and reflections in a physically accurate way. Traditional applications like movies or print only require loftier-resolution 2nd images to be produced, but immersive VR requires the creation of an interactive experience.
That'southward where iRay VR comes in. For those willing to buy, or rent time on, a loftier-functioning computing cluster (like Nvidia's own DGX-100), iRay VR tin generate a navigable model of a scene. The user tin can move around in the scene, and turn their head, while getting physically-authentic lighting, shadows, and reflections as they motility. Nvidia demoed this with an interactive VR model of its planned headquarters that was quite convincing. Unfortunately, even the viewing figurer needs to exist pretty massive — requiring effectually a 24GB frame buffer like the one in the 24GB Quadro M6000 to run.
Even with a supercomputer at hand, rendering for VR requires some compromises. Lucasfilm'due south Lutz Latta explained that, for example, the Millenium Falcon model used for Star Wars is fabricated upwardly of over 4 million polygons. Perfect for the ultimate in cinematic reality, when information technology can exist rendered 1 frame at a time, but too complex for a Star Wars VR experience. In addition to simplifying it, the studio has worked on a fashion to accept a unified nugget specification, and then that models can be congenital once and and so are bachelor for use in a variety of dissimilar media like film and VR.
For those of us on slightly more limited budgets, iRay VR Lite will permit you to upload a model to Nvidia'due south servers, where they volition generate a photorealistic 360-degree stereo view — but one that you tin can't walk around. For a total-fidelity experience, even the Lite version will take advantage of 6GB or more of frame buffer, but the experiences volition likewise be viewable on low-finish devices like Google'south Paper-thin. Nvidia expects to have iRay VR Lite available by mid-yr, with iRay VR to follow.
iRay VR is just ane part of Nvidia'south VRWorks set of tools for VR development and commitment. Other parts of VRWorks too had updates appear at the show. In particular VRWorks SLI volition provide OpenGL across multiple GPUs and there is now a VR support in GameWorks.
Realities.io: Immersive environments fabricated applied
Everest and Mars are both very expensive, long-evolution-cycle, efforts, more or less the equivalent of making a feature film. That limits their creation to big organizations, and their subjects to those that are likely to attract millions. Startup Realities.io has developed a organisation that allows it to relatively quickly, and inexpensively, create photorealistic environments from "everyday" locations. Using effectually 350 photographs of a scene, it tin can use a process called photogrammetry to create an interactive model that the user can walk effectually.
The level of detail is pretty amazing. You can stoop downward and see trash on the flooring, or walk over to a wall and see the brush textures in the graffiti. Realities also captures scene lighting, using light probes, and so reflections change realistically as you move. If you're one of the lucky few that have a Vive, you can download Realities for free via Steam.
Even more than heady, Realities founders David Finsterwalder and Daniel Sproll hope to farther democratize the procedure of creating immersive experiences even more by enabling others to become out and capture the images they can then process and produce.
Orah 4i camera: A run up in real time
A more than common way of creating VR experiences is using 360-caste photographic camera rigs. There are plenty of those on the market, ranging from consumer units with a couple fish-centre lenses to studio-quality rigs like the ones from Samsung and Jaunt VR. However, all of them require a lot of post-processing to accurately stitch the images together. One company, Videostitch, has fabricated a good living providing stitching solutions, just at GTC they announced they've gone i step further. They introduced their own turnkey photographic camera + stitcher, the Orah 4i. Available for pre-social club for $one,800, information technology has four high-quality cameras with 90-degree lenses, which feed synchronized data to a small processor box that stitches them and streams a live 360-degree epitome. In improver to the obvious use for event coverage, the system will also allow excellent real-fourth dimension previewing for those doing high-stop 360-degree production work.
As an bated, the Orah, like most 360-degree camera rigs, does not produce a stereo image. And because it only has one camera facing each management, you can't really generate one after the fact. College cease rigs with more cameras, like Jaunt'southward, do allow mail service-processing to generate depth maps and stereo views.
However, almost all of these units — whether mono or stereo — are arranged together under the umbrella of "VR." Similarly, many "VR" experiences are static 360-caste photos that don't permit you to move around the scene (but may or may non be stereo). It'd be nifty to kickoff to get some standardization on terminology hither. In my case, I've started to use immersive simply for experiences that are both stereo and allow motion within the scene. I retrieve it'd also exist helpful if we simply used VR to refer to experiences with a sense of depth (eastward.g. stereo), but the term is too popular equally a marketing tool for that to be likely to happen.
VR gets downwardly to business
VR at the show wasn't all about entertainment. 2 of the demos I experienced were all about commercial applications. ZeroLight was showing off an amazingly realistic Audi in VR — office of a customer-focused sales feel that Audi will starting time rolling out later this year — consummate with Vive headsets in dealer showrooms that allow you to configure and virtually experience your car.
WorldViz has extended standard VR functionality to make it platonic for many industrial and commercial applications. It allows users to run into each other and work together on a task in a virtual surroundings — even if they have different brand headsets — and it supports much larger "room scale" environments. For example, one client created a virtual infirmary in a gym, and so doctors could examination out the work environment earlier information technology was built. One of the scenarios I ran through involved working on a helicopter rotor. It really brought home the power of the Vive's touch controllers. They are a dramatic pace forward from trying to utilise a modest remote or gaming controller to dispense objects in 3D. I hope Oculus gets their version out shortly.
Is VR correct for you?
VR at GTC was deliberately about well-nigh every awarding other than games — after all we just had VR-frenzy at GDC terminal month — merely for most individuals, VR in 2022 will either exist virtually gaming (I'chiliad a racing sim fan, and so my favorites that are bachelor and then far are Projection Cars and Dirt Rally, simply there are tons of others) or involve fiddling around with 360 experiences using a Gear VR or Cardboard. For those who do buy a high-end headset for gaming, certain the other experiences are cool, but I don't see anyone upgrading their computer and plunking down another $800 just to walk around a virtual Mars for a chip. Beyond that, I'one thousand hoping Google announces something amazing under the Android VR banner in May, that can bridge the gap betwixt the electric current low-end mobile phone offerings and the electric current crop of gamers-and-hackers-merely PC-driven headset offerings.
Source: https://www.extremetech.com/extreme/226230-fire-up-your-gpu-vr-takes-hold-at-nvidias-gtc-2016
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