GAME ENGINE DEVELOPER Reacts to UNREAL ENGINE 5 Demo 

BRB, off deleting Hazel!

Finally, someone who really understands how things are done reacting to the demo.

8:20 noo, can we get the one hour version? Or two, three.. I dont care, its so interesting

I think the most impressive part of this demo was how well and detailed you explained everything.

I'm a 3D animator and I was like Why am I even spending 10 hours ray tracing 5 seconds of footage.

Watching him go through the flying bit frame by frame is nice as that's how I'm gonna experience this when it's on my pc Edit: most likes I've had is about 5 so this is a new milestone, I'll be starting a Patreon soon. This comment thread is a nightmare enter at your owm risk

" i think they took all that Fortnite money and put it too good use" I like how he said that soo much 😂😂😂😂😂👌👌👌👌👌

"Sorry environmentally realistic rock. I can't use you man, you are too good" - The Cherno 2020

EA's severance package : pen, ballpoint. Handshake, hearty

"I have the frostbite pen. This is all I have now." :) The feels.

That's incredible, as you said. There're actually no words to express of how huge it all is and how impressive it is.

This is from Wikipedia about PS5 Architecture and its SSD hard drive: "A custom SSD storage solution was designed for the PlayStation 5 to increase data input/output rates for fast loading times and larger bandwidth. This speed allows games to be more immersive and to support 8K resolution.[1] The base system has a 825 GB SSD connected via a 12-channel interface to the main system, achieving a 5.5 GB/s transfer rate uncompressed, and between 8 to 9 GB/s using compression with the Oodle Kraken protocol from RAD Game Tools. This atypical drive size was found to be optimal for the 12-channel pathway for the system rather than more typical 500 GB or 1 TB units. Direct storage for games is expandable through an NVM Express (NVMe) M.2 port, while additional storage can be made available through USB-compatible drives." It sounds to me like this disk is like one big buffer/channel to VRAM area...

It is GREAT to see the technology having moved forward SO MUCH in my lifetime. Instead of rendering after hours, it can be done DYNAMICALLY.

imagine all the data streaming under the hood. Q_Q the SSD 'innovation' of ps5 actually makes sense now

The fact that he doesn't know the PS5 specs but get can instantly tell that alot of data would need to be read from the SSD to make this a reality is really impressive lol. One of the best videos I've seen. Do not worry about video time or dragging out explanations. Just do your thing and I'll watch. Great video one of my favorites

now that they've got the global illumination thing going I wonder if the algorithm could be extended to work for sound - set the speed of sound and the characteristics of the surfaces. Then you could take an impulse response of the virtual space itself, using its exact geometry.

When you're french and you listen the ue5 demo: The guy on the left: I'm technical director of graphics at epic games The guy on the right: baguette baguette baguette, bonne appétit

Awesome video dude. Explains almost every individual feature in an accessible way, that even layman can understand, whilst still being thorough and technical. Can't wait for your next Unreal 5 breakdown.

The Cherno: "wow, very nice motion blur!" me: *turns off motion blur* . It's not that I don't appreciate the work going into it... it's more that I don't want to get dizzy :D

Who else just stared at the mic activity led as he talked?

The immersion is going to be off the charts. I'm getting spooked by cascading pebbles and static statues.

Came here to just see your reaction of this because i realized i started watching you AFTER this came out..just know, you revealed so much more in this video, than I learned in the last 5 months not seeing this.. you helped me realize exactly how GI works pretty much down to the T.. I’ve had to rethink how Ive been thinking about graphics and lighting.. this is a big jump in my honest opinion. In 2 -3 years when devs fully utilize GI, RTX, or whatever.. it’ll be helluva lot different than baked lighting.

Hey man, really cool video. Being in the industry for 15 years and it's one of the best vulgarization of game engine that I have seen so far. But still, I have 2 concerns regarding this demo. First, there is no AI so I am wondering what will be impact of AI on the engine performance, they have a tendency to eat up a lot of ms on the each frame. The other thing is vegetation, here it's all static rocks, but I would be curious to see how it look like in a FarCry kind of environment with thousand of trees moving with the wind. But still this demo is impressive and is definitively setting the bar high for the next gen games. Also, coming from a producer, we cannot underestimate the value of not creating LOD or normal map out of the Z-Brush high rez model, is THE shit of this demo in my opinion.

Imagine how incredible a Red Faction game would be on this engine.

What I really appreciated is your placement of advertisements. 99% of adds are placed mid-sentence or in the middle of a sequence wrecking the enjoyment of the video. Yours were places so well I didn't even mind the adds at all. Great job in showing your skill in making / understanding entertainment while commenting on others work. Very Very impressed with your work and commentary.

I wanted to know your thoughts on the PS5 specs and how they correlate with this demo!

Dude you need to do these things more often game devs are like the funny ghost in the corner that no one really understands... I truly believe having someone like you create content to help people actually understand what all a game developer has to do.. so on so fourth is incredibly powerful.. keep it up!

24:00 Using that statue, and then using 500 of it, that is the exact same thing as that australian company did 10 years ago... Unlimited detail or what they were called.

2021 Cherno: Hi, welcome to the Unreal Engine 5 series!

As someone who has done some graphics stuff, I really wonder how this nanite stuff will work with rendering hair in real-time as the hair here is clearly static. Moving grass etc as well since it scales with resolution. Very curious indeed.

Little bit of info on the audio bit: I suspect the way they're doing this is by measuring an impulse response. An impulse response is a recording where either a single burst (aka impulse) of white noise, or a full-spectrum frequency sweep, is played out into the given space and then recorded back. The initial sound that was output into the space is then removed from the recording, and there you have your impulse response. Audio engineers have been using this technology to model reverb plugins based on real spaces for quite some time now, look up Altiverb. I'd imagine maybe they're doing some very interesting calculations to adapt this approach to more dynamic spaces? Would be interesting to see how they did it.

Wow this guy got the PS5 architecture by looking this demo... maybe he needs to look it deepley to teach us the diference between the PS5 and Series X

Now the bigger picture..... Storage. Lmao we all know these models with that much detail will fill up a NVMe faster than a fly to poop. Its gonna be amazing when downloading the next AAA game takes up 500Gb on your drive.

I probably wouldn't have watched the demo like this. It really helps that you explained/talked about everything. Also nice to hear your reaction about this.

screen 100% blurry him: "Their motion blur is nice" me: "I hope i can turn that off"

Who just likes to see Cherno nodding and going “mmm hmm, mmm hmm” because he understands everything and we don’t? 😂

I just discovered your channel and i love the way you explain the video reacts step by step. I dont know if someone tells you but i recommend to see the unreal engine 5 video on vimeo. I think its the best way to see it.

@ 10:00 it is not just a direct light, it looks like it has some volumetric light effect into it too. Will we be able to have volumetric light in real time with that as well?

You were right. The bounce lighting is calculated across several frames, which is why you see the delay between the light moving and the GI changing at 13:53

Man, I played BF3 and BF4 a lot. You were the one behind Frostbite! That's awesome.

i would love an old indiana jones game like infernal machine to be completely(like everything) remade with this. it would look so amazing.

as a game developer artist I’m curious about how artists will need to adapt to these new workflows. A lot of my time was spent on creating uv’s, model LODs, baking and material setup to make things look real for PBR. So this is saying we can skip most of that. Will we need uv’s anymore? Will the triangles be so dense that we won’t even need to make textures anymore? And we could just store the colors in the millions of triangles? How much setup is needed in unreal to process this stuff. I’m rambling but I’m excited for this future. Another scene I’m curious about is a dense forest. Do we need to use transparency any more? Would each grass blade and leaf be modeled now? Each hair is modeled for an animal?

I don't know but when the character jumps over to the other side of the area. I don't see any shadows from the debris reflecting on the surface of the area. Another thing, I can't see is when the character view of angle changes the rock shadows look stationary.

20:05 The hand on the door or all other contextual body movement is the most important improvement for me, I hate when characters walk through a curtain using their heads...

Ok can I just say I subscribed just because I appreciate the lack of nonsense in the first minute of this video. Sir you are doing amazing work. !!!

13:35 "it takes a moment to change" yes, the initial change to light and angle is fairly similar to the original position, so most the GI remains in tact off the SLIGHTLY MODIFIED position.

I've found this video (and this channel) thanks to a news on the Videogame website I work for. I really appreciated you sharing your opinion and your knowledge on the subject. You got a new sub :)

Quixel and Mega scan also made miracles with Unreal ! just like icing on cake!

As someone who wants to use UE5 to get into the industry of Game dev. Your video absolutely informed and put everything together for me. Take my sub! I wil be coming here for advice I'm so glad I found your channel!

19:50 my character would never do this prior to Coronavirus, and definitely not during. they need pay attention to lettkng you customize your character tendencies to better complement their newer engines for more immersion.

The water looks terrible, just admit it. ;)

I just started playing with UE4, it's pretty cool. I'm coming from the CAD engineering side so never had much exposure with creating materials, I'm wondering if you can recommend any beginner tutorials on creating and using materials/textures in UE4... all that node connector stuff

As this sort of technology progresses, I'm curious how it might splash back into movie animations. At least for smaller studios that don't have a lot of dedicated rendering hardware. Could make high quality animation more accessible? It's an exciting possibility.

Very interesting, learned a lot. Subbed

10:00 there is actually enough colors to show, assuming there are 256x256x256 different combinations of colors that our computers can produce, although our monitor, displaying 2 green 1 red 1 blue pixel for every detail might not be able to show that to us:D edit: that's exactly 16.776.216 colors. Now thinking that LED monitor pixels have 1r1g1b line, it might be possible to see all colors that our computers produce if there are no compression-performance algorithms applied.

Awesome video. Definitely would like to see you do video on the technical breakdown.

I like to add that they used another neat video effect. They started the demo on her face with blue light and then ended the video again with the blue light on her face from the portal, before turning to watch her enter the portal. I think the blue was chosen specifically because that is the Playstation color of choice. Great video, thank you Cherno!

Now I'm interested to see how cel shading will improve as well

I worry about all these source level high poly/texture sizes, etc for memory consumption. Less for rendering, more for knowing how much space is being taken up Which, as you say, can be streamed from ssd on ps5, not so easy on pc.

I've watched this before and it blew my mind, it's really cool re-watching it with a professional who really understands what's going on because it blows my brain even further. Amazing!

Nice video, but I would have appreciated an in detail analyses on how, in your opinion, they would manage to store so many triangles in memory. Not talking about the rendering, but specifically how billions of tris are stored and eventually compressed (?) on the disk. Only talking about memory footprint which will be insane for different models each one having million triangles. We talk about GBs.. I am really curious about that.

I wonder if raytrace techniques and existing scene geometry can be applied to dynamic audio characteristics. I imagine this working as per-geometry "audio texture" channels that encode audio properties of the materials in the scene... such that you could tweak curtains, walls and metals for their different reflection/absorption/transmission characteristics. Like RT ray tracing, the graphics engine could then perform a kind of room "clap test" for audio (with far less rays than for video) and then tween these dynamics across a number of audio samples, giving each scene a dynamic audio feel. Does anyone know if any engine has ever attempted dynamic acoustics as a geometry/texturing problem? I imagine the effect would be sound properties changing as you move around a room, or outside noise being modulated by the flapping or opening of curtains before an open window... or, the opening of a jail door changing the general echo of a cell. I'm no audio engineer, but I think the principles are similar enough for existing shader pipeline techniques to be applied in approximating this relatively cheaply. I guess the devil is then in making the filter network that can be parameterised to take the most significant characteristics returned by the model. So, yeah... audio texturing in the scene geometry. Has it been done? Are there known problems?

Pretty much the only thing I knew about 3D rendering as a kid was that ambient occlusion and global illumination are bae. I loved watching CINEMA 4D draw a bunch of sample points in the preview mockup and then slowly produce the final image.

I NEED Uncharted 5 in my life.

There's one thing I'm kinda scared when it comes to new engine like Unreal 5 going on with how realistic things are and so on... and that's about how it will affect imaginative creativity over just interpenetration of reality in the gaming industry. This is something that works quite in reverse over the time of the history of games. As techniques and techs moves on with better quality of rendering, much of the visual imagination seems to go out the window. If it was only because "real" is now-a-day easier to make the "unreal", I wouldn't complain much, but as I have tried Unreal 2, Unreal 3 and Unreal 4 as well as Unity 2, 3, 4, 5, 2019 as well as 2020, I noticed a really bad trend in engines development which hinder more and more those who want to make things unreal. As Junya C Motomura told during GDC about the work he and his team has done on Guilty Gears Xrd over 6 years ago, the hardest part of making the game looks like 2D frame-based animation (even if it's 100% 3D real-time rendering) was to fight against the system attempting to make it look "good" as in "realistic" and not as in the artistic direction that they wanted it to go towards. They had to strip most of the Engine's systems down and build their own system with tiny pieces of it. This is because the engine (Unreal 3) lacked the proper tool to change the lighting behavior which, ultimately is made for "realistic" and not "surrealistic". I have experimented one such thing myself with Unity 5 where Unity Tech changed the lighting engine. For rendering and baking realistic stuff, it was great, but the new lighting & rendering system used a different kind of edges detection flow which became non-linear. This helps high-fidelity rendering to be faster and baking lightmaps to be more optimized. But the cost was that every shaders ever made for it that made use of the previous linear edge flow were simply broken and most of those had to implement an update that added a make-shift solution to fix the issue. This isn't about Unreal, but it's a concern always come to my mind ever since it happened to me and that, because I absolutely had to upgrade to get the internal fix of part of my project that wasn't working properly due to the engine having certain specific issues with Android builds, I had to scrap all my models & animations (6 months of works) which ultimately returns me to barely 1 months of work done out of 7 passed. In such a case as displayed in the tech demo, how would the new systems works with a game that should look like a cartoon or a kid's book? What if I want things to look less real for an aesthetic reason? What if I want things to look like a painting? For example, if you wanted to make a game that looks like the movie Spider-Man: into the spider-verse, how would this system work with or against it?

Love how you break down the meaning of some references. Wish you would quickly go into detail as to what normal or bump mapping is as you go while using a visual reference.

I'm more interested in how he kept his hair suffering through "2 month of hell"s before lanchings

but wait you mean when a big open game comes out, we gonna be installing like 400gb for the game, that is if they add all that level of detail?

"2021! that's a while away"

Oh jesus. You're so smart and genius. I'm better understand more deeply. Thank for so much knowledge. Damn this video awesome 🙌💋

did you notice, that at 13:35 the light in the background doesn't change?

Good God, finally someone who actually knows about Game Engine and not someone who keeps guessing about the the graphics and not actually know what they are talkign about! You won my Like and Sub!

the culling sounds a lot like from idtech 7 in doom eternal so wel will be able to cull out parts of meshes instead of entire objects I guess? like perpolygon instead of full object

How would one start to make a game engine and what programs are involved? This is such an amazing topic I'd love for you to give us here your insights on...

I like how warrior women always look like they just took a bath.

@Cherno - don't feel that you have to shorten your comments, we are all ears and eager to hear your thoughts... Thanks, this was an interesting video.

Don't always need a cape to prove something is moving

Would love to see a Cerny + Cherno talk about all the custom hardware and custom exclusive chipsets/technology in the PS5. The triangles is thanks to the geometry engine. Really impressed with UE.V. Looking forward to see what devs create with these tools. Making their life easier is beneficial to all of us.

Great content mate, commentary on point

Damn crazy ! Thank you so much for summarizing them up ! You're amazing !

1k butthurt PC fanboys disliked the video

Yes please, I want to see u talking about the technical breakdown soon. And for the most impressive part is when u actually do know about what's the problem are they talking about, and u did a very detailed explanation for us. Well, I do want to see u discuss it more. 'Cause there's so much new information that I can learn from u.

I've watched a few of these reactions, your reaction was the most impressive. The first person who actually knows what makes this new engine good and why :D

What games and engines handle better fluid interaction with moving objects? I thought it was pretty nice in here, although of course not as impressive as the particle effects, nanite and the lumen stuff.

Convolution Reverbs have been around for a couple of decades now. I'd be surprised if this was the first time it's appeared in a game engine

Love that I’m discovering your take on the new console tech. It’s so nice to get your perspective. It’s clear and precise and I’m learning a lot. Do you think the flying section is interactive or more scripted?

19:50 I want to see how they created the animation AI.

Hey Cherno, Id rather not email you but I have a question, is it better to render objects individually all together or to interleave them and do a bit of each? Since you're working with Vulkan and I'm interested in it I wonder what you picked, maybe the answer is obvious but I'm too new to see it. :)

In the first part, when the girl was walking in the cave, I thought I was watching a docu on National Geoprahic.

I am a student game developer. I want to make a game soon when college is done. Anyway I am not sure if I switch to UE5, not because it is bad, but because it is new, maybe unstable and experimental and a lot of plugins I need need to be rewritten. While UE4 is almost in his final state and would be stable and plugins will probably work. What is best for the clients, a stable game or new techniques. I honestly don't know

The water physics reminded me a bit of Outcast.

I guess thats why they bought the oogle corp. They need a in-engine implementation of a GREAT compression tech to in order for these 8k textures to load faster. Guess they will give you the option to auto-compress in-engine.

Give us all the detail! 2 hour long videos! We are here to listen to your expertise!

Rumor has it that this is just part of a demo Epic will be competing with in the 64K comp at Assembly 2020

Hey! This is interesting video, but unfortunately the audio side got very little by contrast. It's likely as most game devs are more focused on the graphical side of things, rather than audio. As someone who has no experience in game development, but plenty in DSP, I'd like to point out a little about convolutional reverb. How traditional convolutional reverb works is that you simply measure an impulse response of a given space, you get the characteristic of this space in the form of an impulse response and then you can "apply" this impulse response directly. However, the question here is: why are they talking about it like its a big deal? Anyone who knows audio DSP will know that convolutional reverbs are old news for more than a decade now. One potential answer is that they actually allow you to possibly map surface with this layer that basically will instruct the convolutional reverb about what kind of surface it is and how it would acoustically revebrate - somewhat like the raytracing technology, except likely far more rudimentary because doing it on similar scale is absolutely pointless. While this might sound complex, in all honesty from the perspective of a game dev the overall process would be incredibly simple to implement as all you literally have to do is paint things with big brushes as our spatial perception in psychoacoustics is very rudimentary compared to something like a bat. Most games, until this point, have had either no significant variance between environments in reverbration or alternatively different zones are only altered, such as the space stations in Elite Dangerous having incredible amounts of reverb whereas rest of space is just dead. It would be significant milestone if they implemented that and I'd be surprised at this point if they didn't because from a technical perspective, it should not be even close to the other feats here. Basically, it's something that even I could implement alone on a rather rudimentary level. Also, why is the formatting so bad in RU-vid?

where can we download the original uncompressed video of the demo?

Their SSD is ridiculously fast, it can appatently process 2GB of data in about a quarter of a second, also have a look at the (PS5 SSD speed video on youtube)

Yan did you see the Mandalorian making of? That's another unreal engine collab that's ground breaking for film-making I think you will like it. Keep it going.

"Putting that fortnite money to good use" those were my exact thoughts while watching this too!! I don't play it but you have to commend Epic for handling the phenomenon pretty well all things considered. Think of EA forcing studios to use Frostbite or Bethesda clinging to their ancient engine.. Epic is at least bringing their wealth back to the art and science that is game making.

Been obsessed with learning ever since I found out about blender, only problem is with normal commercial based PC's the process is painful, think of a duo core6th Gen processor on 4GB ram and an intel Graphics card with just 500MB ram memory, Painful, I want to learn how to make my own game engine to find out if If I could optimize its efficiency while still allowing me to make 3D worlds on commercial PCs without having to hope I dont fry my processor during render time, or as I work