Watching this in 2020, and Ray Tracing is a beautiful thing.

Hey Linus, I'm from the future, and Ray Tracing is a thing now. Best Wishes, Guy from 2019

8 years later and we now have, prior impossible, true ambient occlusion (also known as ray tracing) in video games

4:35 my right ear was being violated by a low rumble

Short and concise. :) Looking forward to see more.

Will TechQuickie be made in 60fps when available, I think it would help reduce the green blur when Linus moves quickly.

"But is still a far cry from true ambient occlusion." *ba-dum tiss*

2021 here, "uber" computers are a thing and damn is it beautiful.

Ambient occlusion is one of the most amazing things in 3D.

"A far cry for ambient occlusion" What's with the terrible puns :P

Now THIS was a helpful techquickie! Thanks Linus!

Thnx Linus! your videos are always helpful c:

2022. LTT has taught us all ALOT. To think we talked about this stuff like a myth wondering if it would ever happen and now here we are PCS easily do it consoles finally do it and it just keeps getting better

Linus you're the man! You're everywhere when you are most needed! I think that your explanations are the best out there because there are accurate, well-explained and non-biased towards any sponsor, and that makes your sponsors ads a lot more acceptable for me. Great job man! If you came by Mar del Plata I'll buy you a beer!

These are so helpful! Thanks Linus!

Thanks for the explanation really good to know

Techquickie I'm a graphics programmer and I really liked this video Linus you did a great job! Everything said was true :D I just made some new ambient occlusion. I call it Natural Horizon Based Ambient Occlusion.

Something interesting: the source engine calculates all lighting of static objects beforehand and therefore only has to worry about lighting dynamic objects in real time

4:57 Was that just me or did it just blink?

pretty good explanation. keep the good work

Ssao is still very nice, and makes the scene look a lot more realistic, these couple of years later

That low hum in the audio near the end of the video.

awesome video guys, very interesting stuff right there!

Good video. Keep up the good work.

that explains why crysis was so difficult to run. my 9800 GT barely ran it.

One issue with true dynamic ambient occlusion is the amount and shade of the shadow cast on an object in real life can be influenced by the ambient occlusion of another object. So if a reddish shadow is cast on a white wall, that white wall would should then also be casting a shadow with a bit of red tint. The issue with this is knowing what object and what light source to start with, without being required to do pass after pass to get an accurate result. This is why ray tracing is really the only sane solution.

I wish that Techquickie videos had an endless supply of new videos... I need them

i was waiting for this as Fast As Possible for a while now, awsome!

You had some flickering at the end of the video. Intentional?

Never mind the low frequency hum. whats with the screen flashing black starting from 4:48 it only affects the green screen also his hands look weird throughout the whole video..

Hey could you explain further what pixel depth vs scene geometry is? Didn't quite get that.

Linus, what is the gizmo on your right hip that you have to keep checking/adjusting?

2020 Q4 : 8k gaming with Ray tracing is possible.

if you render at a higher resolution, apply ssao, and then downsample back to your screen resolution ssao will be appropriately blurred.

Great video!

Thanks for the lesson.

3:37 HEY! i'm from the future and you have real time ray tracing in 2020.

3:03 lol "FarCry"

I thought the background flickering would be another gag or something but it's probably just Linus's lambo shaking the house while it warms up

Thanks for the 4k option!

what about HBAO?

“Ray tracing is super taxing on hardware” Oh boy Linus is in for one hell of a surprise isn’t he

where did u get the picture at 2:27 ? looks like a park in Craiova , Romania .

Best outro in quite some time :)

1:53 linus wtf went wrong with the green screen editing? Look at ur hands.

I just want to know if I should turn it on or off in H1Z1

Am i the only one who notice that this is the first video in this channel that you can watch in 4K?? Blew my mind that that was a actual option, Thumbs up!

simply amazing

Hello “4 years ago” Linus, we are finally there with hybrid ray tracing from Nvidia.

4K huh?

What was that bass sound that started at 4:35 and didn't stop until the video ended?

"... but it's still a far cry from true ambient occlusion..." I see what you did there Linus.

Nvidia RTX implemented Ray-Tracing Tech. Make a Video on that too! It'll be Very Interesting !

i like the fact that this video provides 4k option.... like everybody have 500 dollars for a damn 4k monitor :3

Hey Linus, was wondering if you are able to make that Mac vs pc video. I don't think the missus fully understands why I'd rather upgrade her pc. Could use some backup lol. Thanks.

please answer me how many takes it took to get the hdd at the butt shot correct.

4:35 for some reason I hear a low hum in my right headphone.

is it just me or is the video a bit glitchy?

0:59 - In this part, when Linus says "Ambient Lighting", he means "Ambient Occlusion" - the two are not the same thing. Unfortunately, this video explains "Ambient Occlusion" without first defining what "Ambient Lighting" is in computer graphics context.

Great video as always, but why is the volume level on these videos always so low compared to other videos on youtube?

3:24 linus predicts RTX

Stupid modern technology and it's limitations....

Hey Linus, could you make a video on how touch screens works ?

I really enjoyed the ambient occlusion fo dis video

listening in 2019 when rtx is actually a thing

This is a really bad and overcomplicated way of explaining AO. AO is a technique invented by Pixar (like many things in computer graphics) before raytracing was fast enough to be used in movies. Rather than trace each ray of light to see what it hits, you just assume the entire environment is lit, and make a few checks to see if anything is blocking the sky. Taking into account only nearby objects. That is much faster but can look weird sometimes. This shows up as a smooth darkening of corners and depressions in the surface. SSAO is a technique invented by Crytek for Crysis. Instead of the more accurate and expensive AO calculations used by Pixar, they simply look at the depth values from the graphics card and use a type of blur effect to make objects that are near each other on the screen cast a smooth darkening around them like AO. SS stands for Screen Space. HBAO is an improvement by Nvidia, that rather than a simple blur tries to more accurately estimate the "horizon" created by nearby obstacles. Horizon Based AO.

I love Linus's ad integrations.

Hey linus i have a question what is cpu parking and unparking

Ray Tracing is theeeeere

„Raytracing is impossible to render in real time!“ Nvidia: hold my Beer !!!

Is the flickering at the end of the video caused by differences in lighting ?

Hey Linus I know you did a video on SLI vs Crossfire, but im curious about how each works. I heard SLI simply divides the screen into halves, thirds or even quarters assigning each section to one gpu, while crossfire has each card render ever other frame, or every 3rd frame, or even every 4th frame. Is this true? it would be cool to show a video on how this works. Thanks

3:35 Nearly impossible to achieve, you say...just wait 4 years

AO in video games look horrible and unreal. I turn it off usually. Because, in lot of games- AO appears when you go near a wall and it creates black borders around the object/character even where the light ray is falling. It makes it looked like cell shaded. Ah, and Far Cry 3 was worse one I've ever seen. Anyway, I just noticed Ambient Occlusion [AO] around Linus's hand.

Thanks from Brazil! Now, I understood :D

😂 I’m a new indie game dev learning about all this and I saw you! Lol I HAD to click on it :) thank you dude lol.

First Dislike

Hey Linus (or anybody reading) ! I have a PC hardware question. I have a gaming PC, but it does not render very quickly. I want to be able to play games as well as have fast render times. Is it possible to have a gaming graphics card as well as a workstaion graphics card in the same PC ? I have an Amd PC.

I always thought of it as "that thing that makes the corners shadowy", but this works too. :D

Thanks Linus :)

Damn, There was a pulseway ad with Linus in it, before the video started, and I didn't realise, I wasn't watching the real video. about to download pulseway now

Linus there is so easy problems with the end of your video it could be just me but the background keeps flashing black except for the corners

I have a question. What is QoS and how does it work? And how do we use it?

do you use a greenscreen? if you do what software do you use to edit?

techquickie in 4K! sweeeeeet i wish i only could experience that

Does anyone know where I can find that image at 3:19 ?

Hmm, may I suggest a topic about headphones. What is there about impedance, frequency response and the like?

nice video and finally in 4k! :o

weird, your video is the most technical I found, it was still a little bit to flat to use it for learning for an exam, but hell it still beats most of those gamy videos by far.

anyone else notice the low frequency hum near the end of the video? also the green screen flickering, i would hazard a guess was related.

but what AO is best? what a bout HBAO or HDAO... or all of the + thingies?

Discussing the difference between modems and routers would make a useful video.

So how close is Voxel-based ambient occlusion to ray tracing?

Hey , Can you also explain Particle density in Games ...?

The fun thing about ray tracing is that it is actually used in some games, such as in Source Engine based ones, like Portal 2, the Left 4 Dead series and Counter Strike Global Offensive. However, it is pre-computed and baked into the levels so that your computer does not have to calculate it in real-time, which of course means that Source lighting can't be dynamic except in some particular cases. It's still a pretty cool thing though, I wonder why not many other engines support it.

Because of that rumble and green screen glitches, I expected an all out horror outro. Was ready for anything.

How come you didn't talk about HBAO? (completely genuine question) Is it just too similar to SSAO? Or does it have some differences worth talking about?

Now that Linus uploads in 4k I must get a 4k monitor!

Would love a tech quickie on Post Processing. Always see this option but i got no idea what it does.

Linus uploads in 4k now!!