snc
Veteran
Yeah but its like compariosn rtx2060ti using dlss to consoles as performance comparison. Not best but still its unique feature for some hw that there is not on other.
Sony PlayStation VR2 (PSVR2)
- Thread starter snc
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I agree the tech is awesome and offers huge potential for increasing VR performance.
Not so, PSVR2 is late to the party in this regard. What it will do is bring eye tracking foveated rendering to the masses though which will be a great thing for everyone. Here are some PC headsets that support eye tracking:
HP Reverb G2 Omnicept
Meta Quest Pro
Varjo Aeor, VR-3 and XR-3
Vive Pro Eye
Nvidia even have a driver level feature to automatically implement eye tracking foveated rendering on any DX11 forward rendered game that uses MSAA (i.e. a lot of VR games). i.e. no specific game support is required for it. So you can do this on PC right now.
snc
Veteran
I know there are other eye tracking solution already (tough "little" more expensive), comment was vs headset without this feature.
Well, actual pixel resolution can be way lower. Probably can't discern 16x16 chunks in the mid periphery. The issue then is detail loss not in clarity but in temporal artefacting. A thin highlight that's not sampled one frame to another will flicker, whereas in real life it's consistently present if blurred. If rendering can find a way to smooth/sample that sort of data without rendering full pixels (??), there are insane savings to be made.
All passes should be processable in different resolutions for them to work with the eyes. The issue is whether GPU and rendering engines can adapt. What's an unknown for PS5 is the variable renderer targets, whatever that tech is official called, and how they fit in with the render pipeline and execute. Do they operate automagically level or do they need integrating with various caveats?
Yup, depending on method used there should be nice boost possible.
Eyes are highly sensitive to temporal variations on outer areas of vision, so proper filtering would be nice.
Though fast tweaks like positive mipmap bias, should help within surfaces.
It certainly will be very interesting to hear how it works.
If it can be mostly transparent to developers during rendering, shading and post processing passes, I'm very impressed.
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Can anyone recall what the tech is named? My Goole-Fu is weak. I know it's in this thread if I decide to go looking! 
The eye tracking and foveated rendering?Can anyone recall what the tech is named? My Goole-Fu is weak. I know it's in this thread if I decide to go looking!
They have tech name?
On unreal engine 5.1 they didn't have a tech name. Just openxr eye tracking, and so on
The adaptive rendering resolution customisation in the GPU. I only recall it being mentioned in a tweet in passing.
It is called Flexible Scale Rasterization and it works with the hardware rasterizer.
Interestingly this patent deals with luminance and chrominance separately.
This is only the theoretical patent and not execution. I don't know what can be done in hardware, particularly regards YUV colourspace rendering to different targets where GPUs + engines work with RGB data and render targets.
There is a japanese article about a CEDEC 2022 Capcom presentation where talk about this. Someone spealing english and japnese did a translation. It is using the hardware rasterizer. This is directly something the dev told during a presentation about development of RE8 on PSVR2.
Sony PlayStation VR2 (PSVR2)
Yeah I agree it's a weird comparison given they're both designed to address the different use cases of their target markets. The fact that Quest Pro is lower resolution and heavier is for example meaningless given the screen needs to be powered from the internal SoC and it has a battery pack...
forum.beyond3d.com
Yes, I know there's a Flexible Hardware Rasterizer in the GPU. What we don't know is how it functions and how it relates to this patent. This patent is the only mention I've found thus far and it seems to cover ground that I doubt makes it into the GPU. Failing any earlier insights, once we get video captures from PSVR2 we can see if it has separate luminance and chrominance scales. Until then, I'm expecting not and it'll be flexible RGB scaling.
snc
Veteran
Therer is also this patent https://patents.google.com/patent/US9710881B2/en
GhostofWar
Regular
John Carmack has been playing down the performance increase from foveated rendering for a while now. I can't find the video I saw him talking about it in but I did find some tweets.
"You can't cut down the number of pixels rendered nearly as aggressively as you might think, because several times a second your eyes will dart to a new position, and the latency from movement through eye tracking, through rendering and displaying a new frame shows a lot of blur."
"You can definitely do things with it, but many people got unrealistic hopes of 10x improvements. You won’t even get 2x versus fixed foveation."
I actually think the eye trackingis worth it just for the automatic ipd adjustment and eye controlled input/navigation anyway but will be curious how much performance it does bring and how useful it is with fresnel lenses. I always turn my head to get whatever im looking at into the lens sweet spot.
"You can't cut down the number of pixels rendered nearly as aggressively as you might think, because several times a second your eyes will dart to a new position, and the latency from movement through eye tracking, through rendering and displaying a new frame shows a lot of blur."
"You can definitely do things with it, but many people got unrealistic hopes of 10x improvements. You won’t even get 2x versus fixed foveation."
I actually think the eye trackingis worth it just for the automatic ipd adjustment and eye controlled input/navigation anyway but will be curious how much performance it does bring and how useful it is with fresnel lenses. I always turn my head to get whatever im looking at into the lens sweet spot.
snc
Veteran
I think its a matter of expectation, imo 50% would be briliant achievement when you cant see diff (as what you look at is sharp), 10x would be like getting new generation, thats quite an expectation ;d
First benchmarks are quite promising
PSVR 2 Foveated Rendering Provides 3.6x Faster Performance - Unity
As reported by Michael Hicks of Android Central, a Unity panel at GDC last week revealed new details about PSVR 2, including ways developers will be able to harness eye tracking in their experiences and the performance benefits gained from doing so. There was no full PSVR 2 reveal at
uploadvr.com
The Performance Benefit Of Foveated Rendering On Quest Pro
Meta revealed the exact performance benefit of foveated rendering on Quest Pro.
uploadvr.com
Carmack talking some sense into people again. He's a legend.
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