Unreal Engine 5 - Ray Tracing Supercharged!

[@Desire4Sound]

Thanks dude, a great video again! UE is massive!

[@JsAnimation24]

If I'm understanding correctly, this UE + real-time ray tracing is a UE fork from Nvidia, not actually built into the core UE, is that right? So I would have to download and run the Nvidia UE fork to get this feature?

[@bastiewebb4432]

Do you know what else is massive? LOOOOOOW TAPER FAAADE

[@thejas123rapperdude]

Isn't there a controversy with UE5 where their lighting and rendering engine is horribly inefficient and its simply painted over by TAA smoothing?

[@zakarkgaming]

yes even marvel rivals is way smoother with TAA rather than the dlss bs

[@judgsmith]

That's what I have heard.

[@marcelomuniz1676]

Yes. Unfortunately Karoly is always bullish on papers and he rarely goes over the cons. And when he does it, he always talks about them as if they were nothing. Truth is, actual high quality path tracing in real time won't be a thing for many many years, and current solutions are poor.

[@hadisoufi7752]

The tech that Unreal uses is catered towards optimising a specific AAA workflow, and for that world it's actually very efficient, legitimately best in class. These studios outsource almost all of their asset creation to 3rd world sweatshops that are constantly competing to drive down costs- and so, assets are typically pretty rough. Similarly, there's a big thrust to use scanned assets (Quixel) as they're very cheap and modular. Nanite enables you to use these poorly optimized meshes without fear. So, it enables level artists to be less technically minded, and thus be faster/cheaper. This comes with some upfront performance costs, but is worth it for the savings. If you have Nanite, you have virtual shadow maps, and if you have those, you can use Lumen. Now you have a reasonably good real-time ray tracing solution that again, eases artist workflows as they can be less technically proficient and still output reasonably good looking and performant scenes. TAA swoops in here to cover for Lumen's failings, and DLSS covers for the overall performance problems that this system causes. This entire suite is a patchwork of solutions to problems that the games industry has created for itself by prioritizing ever-growing profits over quality. Your average indie/hobby developer is not using this workflow, and so, these tools aren't suitable, and can actually make their games look & run worse. This seems obvious, and it is now, but Epic wasn't up front about this stuff in their marketing- they advertise it all as universally useful, when really, it's not. That's the controversy.

[@JustFeral]

That's what morons on reddit with no technical knowledge say, yes.

[@tehfoxxy9630]

Watching these "advancements" of Unreal Engine alongside Threat Interactive breakdowns of Unreal Engine are a treat.

[@Fight2Survive559]

What a time to be in a simulation!

[@davidrenton]

i was doing ray tracing in the early 90's on a 486DX2 66Mhz 4mb ram, yes that's a whole 66Mhz. look at you with your 5 minute frame generation, how fancy,try half a day for a 320x200 image :)

[@MichelHabib]

Good old days 😊

[@VectrexForever]

I started with ray-tracing in the late eighties on an 8 Mhz Amiga 2000, you had to be really patient, but it was magic back then. Insane how much faster it can be done on a GPU now.

[@WolframKresse]

And that back then was indeed merely ray tracing, as opposed to this here being PATH tracing, i.e. including global illumination, which was even MORE expensive back in the days (a.k.a. Radiosity)

[@realitynowassigned]

Look at you with your old ass

[@XenonSCRB]

@@VectrexForever I was doing rtx back in 1627 with some wood and a rock, took me 350 years just to get the first image!!

[@amigodesigns]

Cyberpunk 2077 has had path tracing for a while now, and it's a big step over standard RTX. The only catch is how expensive it is. To get above 60 fps, I'm forced to use DLSS performance mode in 4K with a 4090, but as said, it looks insanely good. If I remember correctly, Alan Wake 2 and a few more games also have path tracing, so it's not something new, but I'm glad to see UE5 implementing this tech.

[@RSpracticalshooting]

Indiana Jones and The Great Circle also looks amazing with Full PT and I get 70-90fps with a 4070 Super in 1440p with DLSS Balanced

[@gavinderulo12]

Here are the games with PT, though there still is some varying degree between them: Cyberpunk, black myth wukong, Alan wake 2 (though mixed with baked lighting), Star wars outlaws uses RTXDI and the latest one is Indiana Jones. Then there are the rtx remix titles like portal rtx, quake rtx etc.

[@NeovanGoth]

@@RSpracticalshootingYeah it's really impressive. On a 4090 I would even call it quite playable in 4K with DLAA, since the frame times are so consistent that even frame rates in the ballpark of 45 to 60 fps feel surprisingly smooth when using a VRR display. Actually I played most of the Vatican level with DLAA, since it's pretty heavy on the CPU and going down to DLSS quality mode didn't provide a significant performance uplift thanks to my Ryzen 9 5900X not being the fastest anymore.

[@RSpracticalshooting]

@@NeovanGoth yeah with games such as great circle, i don't feel the need for 100+ fps to have an enjoyable experience.

[@biggs4lyfe434]

Meanwhile, my heavily modded skyrim still struggles to stabilize at 40 fps with a 4070 super

[@UsernameAwesomeSauce]

3s in and you can see the smearing trailing in the reflection of the ball of light

[@beskamir5977]

Yup.... That's the main trade off of these "real time" ray tracing implementations. Current hardware isn't capable of doing real time ray tracing without relying on multiple frames for denoising so everything looks great in still screenshots, but not in motion. But devs don't care cause the marketing screenshots look great and most people don't notice the motion flaws during gameplay.

[@Phoen1x883]

"I want shorter games with worse graphics made by people who are paid more to work less and I'm not kidding"

[@rlckyrlcardo]

@@Phoen1x883really 1 dimensional way of looking at things but i can tell you most gaming enthusiasts prioritize quality gameplay over 8k real-time raytracing ultra quality games that are pretty but boring

[@BrokeIn97]

I hate everyone who have been screaming about TAA. I was blissfully unaware of the blurring and didn’t notice it until they pointed it out now, it’s driving me insane.

[@zerocore_]

it’s been obvious for years since around the start the the current console generation. most people just lacked the technical knowledge to know what was causing it.

[@Pymell]

I would have never anticipated that the slight delay between the light source moving and the resulting shadows and reflections inherent to these techniques would be so off-putting. That's a real uncanny valley effect for lighting and it's funny that even the instantenous nature of stencil shadows in doom 3 looks less fake, in a way. All these trade-offs in these path-tracing techniques scream "too much, too fast" and other games, for example the Demon Souls remake, have shown that the enormous amount of compute in modern gpus should be used to cleverly combine and refine already proven techniques to create stunning imagery that also remains much more coherent.

[@superior96]

Real time ray tracing + TAA so everything is blurrier than a PS3 whilst on a +2000$ PC. What a time to be alive indeed!!

[@Waffle4569]

What a time to be a Nvidia CEO!

[@GoldenSW]

this is too accurate 🤣it's not the age of raytracing, it's the age of blur.

[@Waffle4569]

@@GoldenSW Everything will be photorealistic when we lower the resolution enough to do it!

[@Demmrir]

Sorry your PC isn't good enough. You gotta use AI to de-blur. DLSS isn't blurry, blur is a TAA thing.

[@GoldenSW]

@@Demmrir DLSS is crap man unless you are using it at 4k and most people aren't. And even in those cases you only get rid of the blurriness, there's still the ghosting. There're tons of comparisons done by tech channels. But it's true that it's the least shitty form of upscaling.

[@Khofax]

Having watched the Veritasium video on rainbows, real life kinda struggles making these caustics visible in colors, seeing it in a simulation is Matrix level of insanity. What a time to be alive!

[@glitchysoup6322]

fourth question - what hardware were used for these demos?

[@ghostofrazgriz1498]

The demos are likely using 4090, but even with these GPU, it still has shit ton of ghosting, yes it's cool, but it's unpractical, rasterizing leads to better results if done properly with much less overhead...

[@computron5824]

Usually a 4090

[@sk.mahdeemahbubsamy2857]

The current Witcher 4 (UE5) trailer was done with an unannounced RTX gpu So basically these demos were done in RTX 5090 if not 4090s

[@damanraaj3496]

@@sk.mahdeemahbubsamy2857 even then, the trailer says it's per-rendered not real time.

[@xBINARYGODx]

RT is fine, but path tracing is many gpu gens out - RT correction GI is great, RT reflections are great, and neither has to be that heavy - I ran quite a nice looking Metro Exodus with all the bells and whistles on a 2070S, so its not like Rt NEEDS to be so heavy, but hey, some developers are just shyt at it and other dont care if their game runs like crap on the hardware most people have apparently.

[@iamski]

Correct me if I'm wrong, but I coulda swore we saw this paper a year ago and this is just a rehash of the previous one?

[@Julzaa]

"Real time" but with a delay, as usual?

[@ZedDevStuff]

Did you know that rendering has delay :D? That's literally how it works

[@eightrice]

@@ZedDevStuffdid you know that "real time" doesn't mean "instantly" ?

[@GoldenSW]

Ray tracing has been both a blessing and a curse for gaming. On one hand we have visuals we could've only dreamed of years ago. On the other hand, games are much harder to run so devs have to rely too much on upscaling and frame generation. I play at 1440p and I can't stand the softness and motion artifacts introduced by upscaling (even DLAA and native TAA feel too soft compared to no AA). I can't even imagine how bad it is at 1080p which is still the most used resolution. Some games do offer you the option to use SMAA, but besides making the game much harder to run, you can tell they were not developed with that mind since there is shimmering everywhere, especially from specular highlights and any form of foliage.

[@austinbaccus]

I haven't really noticed a difference in how good games have looked since about 2017.

[@zelcion]

I'd take no RT and sharp graphics than "next-gen" blurry mess with TAA and many other temporal solutions that smear the image. I honestly dislike this trend. Show me ONE RT solution that isn't noisy and don't require temporal algorithms to smooth imperfections, then I'm sold.

[@Pymell]

In which games did you perceive DLAA to be blurry? Any anti-aliasing technique on a pixel-based screen will need to introduce some blur (which you are probably aware of) and I think DLAA has been quite incredible in how clear it remains without going for straight up super-sampling. It's just that the performance impact is usually higher than I would like (as is the case with ray tracing).

[@IstyManame]

idc until they make good antialiasing that is not blurry in motion

[@mrburns366]

I thought we already had that

[@MattPin]

The video states that Unreal Engine 5 has real-time path tracing, which is a type of ray tracing this means that UE 5 can now render scenes with realistic lighting and reflections in real time, which was previously only possible with offline rendering.

[@chopsuey4698]

You're probably confusing it with rtx? It's not the same thing.

[@RSpracticalshooting]

the title is confusing. we've had real time ray tracing but it's not quite the same as real time path tracing, which is what UE5 is now doing. ray tracing uses a single ray bounce to compute it's light paths. path tracing simulates the full path of light by using multiple ray bounces, making it much more accurate for light simulation. so for ray tracing, the light casts a ray that then bounces off a surface one time and then into the "camera" which is what is displayed to us. with path tracing, the light ray bounces around multiple times before going into the "camera". what we've seen in pre-rendered CGI for years that looks photo real is full path tracing, only recently have we started to be able to compute it in real time, although still with some caveats and draw backs. we're not quite to the point of having real time path tracing on the level of something like the Transformers or Avengers movies.

[@redoberon]

​Cyberpunk 2077 and Alan Wake 2 have have full path tracing aside from standard ray tracing. I believe the default config is 1 ray per pixel with 2 bounces per ray.

[@ericd.9038]

If the confusion is with Unreal specifically, I believe what we had before was hardware-accelerated Lumen specifically, which operates differently from path tracing which people have described in the comments. I was confused too, but I think this is the answer! Someone please feel free to correct me if I’m wrong

[@Khofax]

I don’t have the skills to take advantage of the course you provided but I really appreciate your contribution to freedom of information. Thank you

[@arandomfox999]

You can really see the smeariness of the lighting and how it's not exactly realtime, still impressive but still not really ideal for anything with extreme pacing and detail density. The still screenshots of high intensity moments are bound to look horrible with this.

[@este_marco]

yep, delayed lighting gives me the same ick as when i'm looking at an ai generated video

[@damanraaj3496]

@este_marco well it is probably using DLSS which is AI upscaler

[@este_marco]

@@damanraaj3496 the delay comes from the global illumination processing time, no?

[@greenstonegecko]

I think UE5 needs to chill out and fix the lighting and rendering engine. It's getting out of hand. We need big names in the community to step up and speak out.

[@TheCynicsCynic]

I wonder how long it would take to perform that simulation/render these days. Three weeks, but that was in 2013. Things are a bit faster these days lol.

[@aliancemd]

A Lot of artifacts on that humanoid character, especially on the edges of the character

[@nocultist7050]

why 1080p? to hide ghosting and muddy look of high fidelity details in movement

[@TedThomasTT]

Another UE ad 🙄

[@sanketvaria9734]

they should rather focus on fixing the ghosting artifacts from TAA

[@romella_karmey]

Or you know the most stressful concern. Optimizing it to run on lower hardware for some FPS boost

[@sanketvaria9734]

@romella_karmey it's easy, turn off Raytracing till hardware and software reach to a point where it can be used. Till then fix other potential issues with these new Ai tech like DLSS, FSR, XeSS, PSSR, TSR, etc.

[@WinonaNagy]

I'm blown away by the potential of real-time path tracing! The future of gaming and virtual worlds just got a whole lot brighter .

[@Atreyuwu]

Dude, you're wonderful. Really. One of my favorite all time tech YT'rs.

[@mycloudvip]

Thanks for the offering! I never miss any of your videos and updates!

[@nathsabari97]

That means nvidia gpus come with more vram next year right?

[@necnotv1683]

Good one. Only if you get yourself a 5090

[@Napert]

5080 gets just 12gb as the rest of the vram went to other "ai" cards that make them billions in revenue instead

[@my-wifes-boyfriend-is-a-lawyer]

Dream on

[@damanraaj3496]

lol

[@joek6207]

The implementation of TAA in UE5 is an abomination and they should be ashamed. They need to fix that before adding any new features

[@NeovanGoth]

UE5's TSR is actually pretty good. The problem is that a lot of console games still use FSR instead, which tends to look absolutely terrible when combined low input resolutions.

[@DreamCodeLove]

Finally making full use of RTX 4090 cards ...

[@Jolly-Green-Steve]

Indiana Jones has path tracing and it looks pretty good.

[@YaBoyBlade]

Unreal Engine is looking more blurry by the update.

[@romella_karmey]

Uglier and performance hungrier than ever 😂

[@blastbuilder2430]

To achieve the impossible there has to be trade offs somewhere. In this case you can clearly see the blurring when the view changes even in their own demo videos at 30p. This is great improvement but not really suitable for games in my opinion.

[@UmmerFarooq-wx4yo]

It's great for developers and time spent on developing

[@PbPomper]

I'm not so sure about this. This is not proper path tracing here. It'll probably lead to a lot of smearing to clean things up / hide things.

[@Ifortgor]

I like my games unoptimized bruh

[@feathersm7966]

yay more tsaa smoothing and unoptimised graphical bugginess

[@CastleRene]

I love the way you talk. My anticipation rises between, every word!

[@verendale1789]

Maybe make Lumen usable first.

[@achmedabadoba5478]

These pictures look amazing. Like even Hyper realistic. I think the next big challenge will be simulating imperfections in materials and models. Also dusty air might influence the light bouncing.

[@ValorCatStudiosinc]

Realtime Spectral Rendering without denoising is my dream!

[@suri4Musiq]

Why does it feel like I have heard this before? Real-time Ray Tracing is here?

[@ghostofrazgriz1498]

"Realtime", I mean, you can clearly see there's like 8 frames of accumulating light information, yeah it's impressive, but probably not usable unless the game runs at 200fps

[@elgodric]

This engine is a absolute FAILURE! What good graphics do if the performance is shit.

[@buffaloSoldier519]

Now if Nvidia will stop selling cards with 4-12GB because all these optimizations require tons of memory.

[@NeovanGoth]

That would indeed be very helpful.

[@MikeDawson1]

what bothers me most about current ray/path tracing in games is that it re-uses information from old frames, so whenever you pan the camera around you get streaks. That bothers me so much that I'd rather just turn it all off. My favorite is when devs bake in global illumination into the map's textures - no framerate hit and it looks beautiful

[@Ariel16283]

I was actually able to hold onto my papers during the video, but all went flying around after the unadivised free course announcement.

[@Ariel16283]

What a time to be alive!

[@__-tz6xx]

All the GPUs being released around 2028 will have good ray tracing abilities about the same time that the next Playstation gets released.

[@gavinderulo12]

If the next playstation is comparable to a 4090 then most games will fully rely on path tracing, especially if more optimizations happen until then.

[@OriginRow]

Unreal Engine 6 requirements are like minimum Google's newly announced Quantum Willow Processor

[@kanta32100]

Who knows, maybe next generation of gpu's will have special precessor for ray tracing.

[@freedomcoder2983]

@@kanta32100 exactly what they have already? Never heard of Nvidia RT Cores?

[@michi-fv2mf]

Cool to see you taught at TU Wien! Wish you came to my uni some time!!

[@ChrisGuerra31]

Ghosts are just users In our simulation activating noclip

[@Alpha13yt]

*Requires using it on 1080p *Requires upscaling it from 480p *Requires Frame Gen *Requires RTX 4090 at minimum *May result in blurriness *May result in jitteriness But yeah other than that, it looks great

[@rogueyun9613]

i used to think "The Hitchhiker's Guide to the Galaxy" was just a funny work of fiction, but now I think maybe Earth is the computer designed to solve the ultimate question.

[@benmcreynolds8581]

I support all kinds of advancements in tech. I'm curious if one day we could see some kind of Tech that specializes in improving the ways Graphics Cards render out each frame, improving How the CPU gets utilized. Currently we are seeing tons of progress in the hardware department BUT it seems like we are falling behind in the software department and our development/coding department. These things are key if we want the ability to utilize our hardware to its fullest potential.. The Issues we are dealing with is inefficiencies in the realm of rendering prioritization, processing efficiency, finding and fixing code in order to optimize video games, or physics simulation models

[@anywallsocket]

Finally some news that isn’t LLM slop 🙏

[@mortysmith666]

Looks blurry , pretty sure it's those things so called ai upscaler

[@nonstopjoliver]

Now we need more advancements in material physics. Clothes and items that do not clip. Real-time morphing. Blacksmith simulator would be cool.

[@magzpayne]

Yeah! Like we had in 2003 in the half life 2 tech demo (and game)! It's time to go back to the future! Hasta la vista, baby!

[@paulgrant7221]

I appreciate that this is near the cutting edge, but it would be very interesting to know what hardware it was running on. I imagine that it's running on top spec hardware, so not particularly usable/achievable for most gamers?

[@henrythegreatamerican8136]

Impressive, but most uf don't care about ray tracing. It's nice to have but not mandatory. In other words, it's a marketing gimmick.

[@hiho9149]

Good direction, bad implementation. Developers are encouraged to be lazy about optimization when using UE5 and it drastically decreases performance on most hardware. I'm all for innovation in this direction but I wish developers wouldn't integrate this technology until it's mature enough, or are at least conscious about optimization. I'm sick of 30fps still being a standard, you probably need a powerhouse to run whatever is in that video reasonably.

[@herozero777]

Thanks man!

[@obtFusi]

I waiting for this since the quake 3 ray tracing demo, and that was 2004! And physics is also still a big problem. I hope this time will come (in my life) when software and hardware has advanced enough. Will see how much ML can help us to achieve that goal in time.

[@bzikarius]

I still see shadow, crawling with delay about 0.5s. So dynamic hq RT is far from realtime with modern hardware and even with great algorythms. BUT! Raytraced static global illumination still looks very good and add significant improvement to game scenes, i remember how it changes the impression in Witcher3 interiors. So the technology should exist.

[@NeovanGoth]

The issue is with supported material properties. What you mean with "raytraced static global illumination" is probably what I would describe as "baking lightmaps in real-time". This can look pretty neat, but it has the big downside that it only supports perfectly diffuse materials, which in reality don't exist. Every real material has a combination of diffuse and specular reflectivity, which means its shading does not only depend on the position of the light sources, but also the position of the observer (probably what you mean with "dynamic").

[@CadetGriffin]

<a href="#" class="seekto" data-time="254">4:14</a> - POV: You're getting scanned after being held on to by a fellow scholar.

[@cptairwolf]

We've had path tracing in quite a few videos now but the performance cost is pretty massive. Hopefully future hardware will be build from the ground up to focus on raytracing techniques so we can finally kill off rasterizing

[@LordBaileyDev]

Great. I just hope people understand that beauty and fun is two different things. You can still play Super Mario Cart 64 and still have fun. The problem with this tech comes when devs use it as a marketing tool to sell shovelware.

[@c016smith52]

Awesome!!

[@Alorand]

I prefer the hard hitting criticism from Threat Interactive over this breathless glazing that doesn't make it past previews.

[@TheAkdzyn]

Thank you for the free lesson Dr Karloi Faher. These insights are explosive in the gaming community. Always grateful for the paper updates and resources.

[@mortoopz]

That shot at <a href="#" class="seekto" data-time="22">0:22</a> must've hurt your soul as a light transport guy, I just do CGI and it made me grind my teeth.

[@Dr.W.Krueger]

Great, even fancier slop

[@VoxelGarage]

We don’t need all hardware to do raytracing. But a separate line of graphics cards is sufficient

[@k1ngjulien_]

so its still not full, physically accurate path tracing? why the hype if its not the real thing? rtx has been around for a while.

[@NeovanGoth]

What means "physically accurate"? Path tracing is an approximation of the rendering equation, which produces physically accurate results, ergo path tracing produces an approximation of physically accurate results. How good this approximation is depends on factors like the number of rays, number of bounces, how well denoising works, and so on, but even lower quality path tracing would be physically accurate in the sense that it simulates how light behaves. The much more interesting question would be how close it is to the ground truth, and if there are notable limitations.

[@computron5824]

@@NeovanGoth It diverges quite a bit from a good offline path tracer, and yes there are a lot of limitations. As mentioned in the video, its a significantly lower number of rays, and refraction isn't path traced. No path traced volumetrics, or DOF of course. It is not path tracing hair curves, and it also can't fully handle skylights. The current denoiser it ships with is incredibly destructive, but luckily ray reconstruction is on the way. Visually it doesn't look that different from the latest iteration of Unreal's native lighting system. Try the NVRTX branch yourself and see if it can handle what you need. I personally would've kept the name ReSTIR in marketing, because in my opinion it does diverge a lot from the ground truth.

[@raukoring]

Guy 100% being paid by Jensen to be this optimistic about bs scamtracing. And it didn't even cost Jensen much judging by his hunglish.

[@joeillingworth1141]

Great more games that no one's current system can run without being upgraded to a stupendous cost

[@getsideways7257]

You say you are puzzled why they uploaded the video in measly 1080p in the age of 4K+ monitors, but I'm more puzzled why you still use 1440p SDR when pretty much all of this needs to be shown AT LEAST in 4K HDR10...

[@rulonoboev1783]

Unreal has the worst ray tracing in the industry, it's so ugly and inefficient

[@thomasgoodwin2648]

Some RTX cards are more RTX than others. Yesterday's monster is still just today's abacus. With tomorrow's performance, comes tomorrow's prices. 🖖😎👍

[@vanniyo8988]

This doesn't help the consumers; it helps the developers. If i was a head of a studio I'd use this as a reference point and not utilize it in game because to make as much money as possible you have to market to mainstream consumers who likely aren't going to have state of the art cutting edge gpus. Instead of using these features the correct way to gain an advantage; this seems to make the industry lazy or incompetent.

[@GloriousEagle69]

Rip any future hope of 60 fps

[@heoflyfree9253]

我还以为是旧视频

[@shinaken]

I'm confused, I thought games have already been doing this for the past few years. Is the difference the visual noise?

[@ReginaCæliLætare]

Now games will be even less optimized

[@vietnt2013]

feel like an ads? reSTIR is 3 years old tech from nvidia?

[@pryzmgaming]

UE5 poor performance about to get even worse.

[@lau6438]

ReSTIR is magic!!!

[@SlizenDize]

I'm gonna make an engine so realistic reality will try to copy it.

[@Appleloucious]

Not really new, some games have path tracing already.

[@JapaneseCīnaTaiwanese]

Ray tracing ??? Useless

[@Myrslokstok]

They will have to add noice or it will look to real!

[@cappybenton]

Wunderbar

[@SP-ny1fk]

Can you read a poem for us Károly?

[@MatthiasLindemann-hp2zr]

Would certainly be a great feature if the developers hadn't broken the Unreal engine. Every game that comes onto the market with the Unreal engine is broken and has thousands of bugs. In addition, the performance of the engine is miserable. People buy graphics cards for $2000 and can only play with 30-50 FPS because the Unreal engine is so badly optimized. What good are all these features if the engine is not able to fully utilize these features without bugs and performance drops.

[@qingishida4777]

no worries just update for additional 256 gigs

[@GuilhermeSilva-kx6ms]

I know baked lights are a pain for developers, but I still prefer them to ray tracing. Games from 2006 had lower textures and lower quality models, but overall, I still think they looked and felt better

[@javebjorkman]

Real question: why do we need it to be real time? Could we like bake the raytracing once the environment is finalized? That way, you still get “accurate” lighting without the cost? For day/night cycle games, why don’t they just bake every single hour? Idk I know nothing lol but would love a serious answer

[@Pymell]

Games with a day/night cycle already blend between pre-baked lighting information, though usually not for every hour but bigger intervals. Storing the lighting information for every hour would result in an enourmous install size and open world games already are quite big. A real time solution would allow for more detailed lighting and pre-baked lighting simply doesn't (meaningfully) interact with dynamic objects like your character, enemies, or dynamic physics objects. There are a lot of techniques to make this interaction possible but as you can probably tell, we're not quite there yet.

[@ryangreyson]

You should fix your titel, I was confused as hell. But really interesting video

[@Madlion]

They mentioned its a form of Restir no?

[@blackthorn8639]

What a joy but... you need really powerful system to even get 30fps...forget 120fps😂

[@CastleRene]

I bet that this algorithm uses BSP, doesn't it?