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VRS tier 2 offers up to 50% fps increase for negligible graphical trade-off.

DukeBlueBall

DukeBlueBall

Banned
Oct 27, 2017
9,059
Seattle, WA
Courtesy of resident expert dgrdsv.

dgrdsv said:
While we're on this topic, the new VRS Tier 2 3DMark test is fairly impressive - little perceptible difference with as much as +50% of performance.
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In combination with the flop efficiencies, the RPM, the conservative rasterizer, VRS the 10TF+ Navi in the new console might actually perform like a 20TF+ Polaris part in certain scenarios. That's not even including the RT/AI capabilities.
 
dgrdsv

dgrdsv

Member
Oct 25, 2017
11,884
I'd say that straight up doubling the performance of Polaris is grossly optimistic. We have to assume that the scene in 3DMark was crafted specifically to showcase the feature and it is very possible that real world (game engines) scenarios will result in lower gains.

Still, this result is impressive considering that there' little perceptible quality loss with VRS on, especially in motion. If we'll get even half of that in real applications it would put next gen consoles quite a bit above where you would assume they'll be from pure flops numbers.
 
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DukeBlueBall

DukeBlueBall

Banned
Oct 27, 2017
9,059
Seattle, WA
dgrdsv said:
Still, this result is impressive considering that there' little perceptible quality loss with VRS on, especially in motion. If we'll get even half of that in real applications it would put next gen consoles quite a bit above where you would assume they'll be from pure flops numbers.
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I originally thought VRS is a mere optimistic 15% uplift, but a consistent 25% uplift is pretty awesome.
 
AegonSnake

AegonSnake

Banned
Oct 25, 2017
9,566
20 tflops? free spinningbirdkick!

if vrs is truly a gamechanger than we might be looking at the unreal engine 4 rebirth demo as the baseline.
 
Gusy

Gusy

Member
Oct 27, 2017
1,070
So this is similar to what foveated rendering does for VR right?
 
1-D_FE

1-D_FE

Member
Oct 27, 2017
8,259
Wish their was some voodoo that would allow this to work on a driver level. It would be great for a high FOV environment like VR. Even without eye tracking, I would still trade lower peripheral fidelity for a large boost in performance.
 
dgrdsv

dgrdsv

Member
Oct 25, 2017
11,884
DukeBlueBall said:
I originally thought VRS is a mere optimistic 15% uplift, but a consistent 25% uplift is pretty awesome.
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Well, +10% is what you're getting in Wolfensteins right now and their implementation of VRS is done as a post-launch PC specific renderer tweak which likely means that it's not ideal. So a +20-25% was always on the table for next gen thanks to VRS, IMO. More than that though? I dunno.
 
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DukeBlueBall

DukeBlueBall

Banned
Oct 27, 2017
9,059
Seattle, WA
dgrdsv said:
Well, +10% is what you're getting in Wolfensteins right now and their implementation of VRS is done as a post-launch PC specific renderer tweak which likely means that it's not ideal. So a +20-25% was always on the table for next gen thanks to VRS, IMO. More than that though? I dunno.
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Is it possible to enable it at the driver level, so that BC games get it for free on consoles / PC without developer work?
 
Pargon

Pargon

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Oct 27, 2017
12,016
It's quite a bit more obvious in full resolution, less-compressed images.
But you'd probably notice it less in motion, especially if the game was using TAA.
 
BeI

BeI

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Dec 9, 2017
5,980
This seems like the sort of thing that will disproportionately benefit consoles. PCs often don't even get the dynamic resolution that console versions do.
 
low-G

low-G

Member
Oct 25, 2017
8,144
I wonder if there's any reason they couldn't output full resolution albedo while doing everything else at a lower shader complexity / res.

BeImonkey said:
This seems like the sort of thing that will disproportionately benefit consoles. PCs often don't even get the dynamic resolution that console versions do.
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This isn't dependent on dynamic resolution, it's dynamic shading.
 

Gitaroo

Member
Nov 3, 2017
8,001
Didn't they implement something similar for the new cod engine for current gen consoles to boost performance?
 

Sunlight

Member
Apr 22, 2019
375
Why do previous GPUs never have VRS?

Is there any technical limitation to prevent GPUs from including VRS?
 
JahIthBer

JahIthBer

Member
Jan 27, 2018
10,382
Doesn't get these numbers in Wolfenstein II, benchmarks don't make real world performance.
 
Alexious

Alexious

Executive Editor for Games at Wccftech
Verified
Oct 26, 2017
909
Interestingly, Microsoft's own VRS benchmark showcased at GDC 2019, based on Civilization VI, only improved performance by 14%.

I'd say a lot depends on the engine and the game.
 
DonMigs85

DonMigs85

Banned
Oct 28, 2017
2,770
In concert with CAS for sub-4K titles it should work wonders since a ton of games will likely use TAA
 
dgrdsv

dgrdsv

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Oct 25, 2017
11,884
DukeBlueBall said:
Is it possible to enable it at the driver level, so that BC games get it for free on consoles / PC without developer work?
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Doubtful. The engine must choose which parts of the final frame can be shaded with lower resolution. Driver probably won't be able to decide on this by itself, especially since it's D3D12 or VK driver.
 
Alexious

Alexious

Executive Editor for Games at Wccftech
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Oct 26, 2017
909
This would be especially useful in VR situations, while we wait for proper foveated rendering.
 
Pottuvoi

Pottuvoi

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Oct 28, 2017
3,064
low-G said:
I wonder if there's any reason they couldn't output full resolution albedo while doing everything else at a lower shader complexity / res.
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Interesting idea, even if albedo in modern PBR is quite low frequency.
A 'detail texture' kind of additional layer could be possible.

VRS is basically a version of MSAA in which you choose the MSAA shading resolution quite freely during rendering. (Actual resolution and buffer stays the same.)
Sunlight said:
Why do previous GPUs never have VRS?

Is there any technical limitation to prevent GPUs from including VRS?
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This version of VRS needs most likely a hardware alteration to MSAA.
DukeBlueBall said:
I wonder if this will work well with temporal upscaling. Maybe some parts of the image gets super blurry.
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One needs to take account the new sample locations for pixels in TAA, but after that it should work as intended.
Jittered rendering also reduces the 'low res grid' look of VRS.

As always one needs to select correct mipmaps and methods which take account of coarseness of shading. (paper.)
 
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headspawn

headspawn

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Oct 27, 2017
14,615
What kind of performance gains were there in Wolfenstein 2 with VRS enabled? Comparable to this or nah?

(i only have the console version and no turing gpu)
 
tuxfool

tuxfool

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Oct 25, 2017
5,858
Pargon said:
It's quite a bit more obvious in full resolution, less-compressed images.
But you'd probably notice it less in motion, especially if the game was using TAA.
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Yeah, it's pretty obvious, worse yet, is that its highly visible on surfaces that are adjacent to each other, for some reason some areas of the broken wall retain far more detail than others.
 
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