NVIDIA to Showcase Real-Time RTX Path Tracing in Cyberpunk 2077 at GDC 2023
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fantaskarsef
What? Really?
Reddoguk
Real time ray tracing will improve performance? Erm i don't know about that. Seems it should be the other way around.
Agonist
If you buy a $2000 RTX 5090 and use DLSS 4 it will.
Denial
I imagine they mean it will reduce performance issues vs the current implementation.
Could be using newer techniques that reduce ray count per pixel while maintaining image quality via better denoiser, etc.
AuerX
That would be cool 🙂
alanm
"Path tracing differs with ray tracing in that instead of following lots of rays, throughout an entire scene, the algorithm only traces the most likely path for the light..."
https://www.techspot.com/article/2485-path-tracing-vs-ray-tracing/
H83
I tried RT on Cyberpunk during the brief time i had a 6950xt and i was underwhelmed with it, the differences were very small, light seemed more saturated and maybe a little more natural, but that was it.
But the performance hit was huge, the frame rate tanked by two thirds!!!
Maybe Cyberpunk is not the best game to showcase RT potential, but i was expecting much more.
Interesting read but it seems path tracing is still too demanding for modern GPUs.
I can be completly wrong but i think dedicated RT cards make sense because building GPUs with great raster and RT performance is starting to seem almost impossible.
Or maybe SLI/Crossfire can still make a triumphant return!...
TheDeeGee
I don't care for ray tracing in modern games.
But i'm so very much looking forward to what RTX Remix will bring us in terms of old games getting remastered, it makes such a world of difference for the retro games that did get proper ray tracing so far.
pedropaulo
I like RT in reflections, sahdows and other stuff, i cant see the difference.
Hogwarts legacy, even with, apparently broken RT, was some stunning indoors scenarios.
Crazy Joe
NVIDIA has been working on techniques to reduce the cost of path tracing and/or ray tracing for quite some time.
Here is a video from Two Minute Papers which shows some of the work that was done late last year.
My guess is that they took the some of this work and implemented it in the Cyberpunk 2077 renderer.
[youtube=NRmkr50mkEE]
pirlampas
Yeah that's how all these new "ray"-traced classics like Quake II, Doom, Half-Life and the like work. Those work because of their simple meshes, others like Portal RTX are comparatively more complex and suffer because of it, but I guess they can make better improvements in-house if they plan to apply it big time in a very hungry AAA title, even if it's a tech demo.
Embra
I wonder if this technology will be backward compatitible with 3xxx and 2xxx RTX cards.
mackintosh
Knowing nvidia, assuming it is technically possible, they are unlikely to port it to 2xxx cards. 3xxx is a definite possibility. 2xxx is a wasted effort considering only the 2080Ti has the performance. Sucks to be a 2080Ti owner, but that's nothing new.
fantaskarsef
Well I guess so? Thing is performance will arguably be abysmal, I expect it to not run above 30fps in all but the high end Ampere cards either.
It doesn't matter if it's a 2080Ti or sometime down the road a 3080Ti's user... such features are almost all the time locked behind a wall because manufacturer's chose to. Sometimes it doesn't work well performance wise, I agree with you there. No discussion about it, but even when the performance is equal or sometimes better they do not do that since nobody would pay more for a newer card...
Look at the 2080Ti compared to a 3060Ti / 3070, or look at a top line Ampere card compared to Lovelace's wreck of midrange GPUs... even Ampere owners do not get all the features anymore, and 100% won't do so with any Hopper releases...
Yeah, you are right, but the scenario you describe is only a momentarily chosen snapshot, the principle carries over to any new gen / last gen / 2 gens ago constellation.
mackintosh
Genuine question, when was the last time a feature was gate-kept from a previous generation despite it having the hardware to support it? Other than DLSS 3, which I assume the 2xxx cards could support.
Pryme
So... can we attest that Cyberpunk is bug free? Or is CDPR dedicating the time just for graphics and not caring to fix the game? I still have PTSD from the mess that was when I played on patch 1.02 (very small playtime until uninstalled).
GoldenTiger
The optical flow accelerator in those cards isn't fad to enough to do DLSS3 they've said. It's not a gatekeeping, it's a hardware issue.
