When others code it is frustrating but when Sebastian codes it looks like he is Ballet Dancing like the world is on 0 difficulty

You are the Bob Ross of coding with phrases like "Our little raytracer" and I love it.

It always sounds like Sebastian is explaining all this cool stuff with a massive smile on his face. Like you can just hear it in his voice. And his happiness make me happy in a way. I love your work, keep it up :D

Whenever Sebastian says "How this works is super simple", I pay extra attention.

Always a good day when a Coding Adventure releases

Sebastian doesn't upload often, but when he does you know I'm clicking on it immediately

"Truly one of the artworks of all time." Couldn't agree more, it's definitely one of them!

how in the world did you make this so nice to watch the catto, the tomato, and your slight sense of humor is simply perfect

Sebastian is the definition of quality over quantity

MOM! SEBASTIAN LAGUE DROPPED ANOTHER VIDEO! CANCEL THE DENTIST!

is it just me, or does Seb sound like hes smiling the whole time as he records

That technical difficulty during the FOV part in the intro had me in stitches, unapologetically showing that even though we have the lofty goal of ray tracing we can still have something so trivial trip us up. I just love how incredibly informative as well as entertaining Sebastian is

The juxtaposition between the calm, confident voiceover and the sudden bugs never fails to make me chuckle

The series continues, and I'm very grateful for this Sebastian!

I can't even begin to image how much work it must have been to write all these visualizations. Keep up the good work.

Absolutely glued to the screen. You produce some of the best balance of technical and visual teaching/adventuring I've ever seen, video after video, and this was by far my favorite! Wonderful work :)

"Truly one of the artworks of all time. Anyway, what's going on with this tomato?" is easily one of the transitions I've ever seen.

I don’t know if I’m disappointed or excited. I was expecting a April fools video but honestly this is the best video released today. ❤

I love how relaxing and inspiring your videos are. I’m always getting a humble„No big deal“ vibe, which pushes me to never be too proud of my achievements but accepting them as the next step but not the last. Thanks for your hard work! Very appreciated ❤

Your channel is just so chill!!! I love it!!! Keep it up bro!

Hey Seb, I just wanted to appreciate the extra effort you take to code/setup your visualisations that aren't part of the project but enrich your explanations substanially. Animations, concise statements, music, all of it sparks my sometimes diminishing love and passion for programming. Thank you.

Would highly suggest adding a bounding volume hierarchy to your little renderer! Makes a world of difference in performance. Also if you really want to get into the advanced features of a path tracer, try implementing multiple importance sampling with next event estimation!

I love how you walk through stuff like this. You get the audience to ask, "What is the next natural step?" and give them the breathing room to think of an answer. Then you show them what you came up with and sort of hint at why it is a useful concept more generally without saying it explicitly. Your videos are simply fantastic at getting people (specifically me) to think through complex problems in small rational steps. Bravo. Keep it up!

This was a super fascinating watch. Ray trace rendering was always one of those things I just accepted to be magic, but this broke things down in a way that was really incredibly easy to follow. Really great video.

It's amazing how I am entertained both by a gentleman like Sebastian, with his calm and warm voice, and by characters like The Code Bullet, his cursing and his madness. Different Content Creators, united together with many others by the passion for coding. ❤ thanks

Incredible video ! I usually have a hard time understanding these more complicated aspects of computers, games, renderers, basically technical stuff, and while it still is a struggle, your videos make these so much easier to comprehend or at least visualize. This 40min vid felt like a 20min one with how well everything was presented. Incredible stuff, as always ! And these renders are really cool looking !

I love how you're keeping these classic sign flip issues and little mistakes in the video - very relatable ❤

his video feels both calm and inspiring, and never boring

Man i love this 'Coding Adventure' series. Insane video, as usual

Running a butter smooth code means a lot of testing and tons of bug fixing that we don’t see. He goes through these issues to create 40min~ long videos for us

I LOVE your content. Incredible attention to detail. I've had similiar projects in my head, projecting my ideas, and the pipeline of stuff. I really need to kick this off. Hats off to your content. Its magical.

The final animation focusing on the knight looked so nice, really great video!

Gotta put everything down and watch every time I see the notification for these.

I specialised in physically-based rendering during my master's degree, had to do a whole ray-tracing project very similar to this so was very nice to revisit some of the theory along with such wonderful visualisation. Your presentation of the ideas at play here is an absolute joy and your code is pristine as ever - always a pleasure to see what you're working on, thanks for the great content! :)

Man, this is by far my favorite channel on UKposts. The stuff you create is always so cool and interesting, and the quality is just out of this world. I honestly wouldn't be surprised if you spent significantly more time coding the visualizations of what your code does than writing the actual code, but that effort really pays off in the final video.

Another fantastic video 🤩 I love how you start with literally nothing and step by step work up to a working raytracer. Did not expect to see a depth of field effect in this video tbh, but I'm happy you added it. It looks so amazing. Can't wait for the next part.

A quick note about the rejection method you used for the random direction originally, while it is true that about half of the time it will find a good candidate, so on the CPU it would only run on average less than 2 times, on the GPU threads are done in groups of 32 (NVIDIA) or 64 (Intel, AMD), and the threads in one of these groups can only continue once all of them does. I did some tests and that results in 6 or so iterations before exiting on average on 32 thread systems.

I love your stuff. Your visuals are so clean and satisfying. You also have perfect concise explanation that are still very informational and in deapth. Honestly you are probably my favorite codeing/dev channels. Also, really good at getting me inspired to do similar projects for fun.

I absolutely love how exploratory and educational every one of your videos are. Every video is so well put together and your explanations are clear. I don't think there's been a single video that you've made that hasn't taught me anything new.

I absolutely love your calm coding adventures. You have spurred me to create many adventures of my own and I cannot thank you enough! Thank you!!

I wrote some kind of ray tracer 2 years ago, but for sound sources in a reflecting (reverbing) room. Like a 3D sound simulator. I just tried to figure out everything by myself without any knowledge - and of course i stumbled over some of problems i weren't able to solve by myself. It's really nice to see this video and how you came to every single of my problems and then showed how to solve them :)

I swear because of these types of videos i am learning again why i love to work in this field and how much I just love the sheer wonder and fascination of making math look good. I was grinning the whole time like an idiot during the reflections part and its also partly the fault of the video, because your videos are so well done and cinematic, I could watch them all day and just leave them running in the background

Your videos are honestly incredible - Please keep making them!

I didn't expect a video about programming to be so soothing. I love this.

13:00 You want to create points using a distribution in (x,y,z) that is only a function of (x^2 + y^2 + z^2) = r^2 (that means it has no dependence on direction, which means the points will be evenly spaced across the surface of a sphere). If we take x, y, z separately, the resulting distribution f(x, y, z)dx dy dz = f(x)dx \* f(y)dy \* f(z)dz (this is because the three are independent (because we calculated them separately), so the probability of finding our output position in the range (x, y, z) -> (x+dx, y+dy, z+dz) is equal to the probability of finding x in that range, times the probability of finding y, in that range, times the probability of finding z in that range. Like how the probability of flipping a coin and getting heads three times is the probability of getting heads once, times the probability of getting heads once, times the probability of getting heads once) Intuitively, it seems that we should take x, y, z from the same distribution (because it's independent of direction, we can't treat different directions differently). Applying these, we see: f(r^2) = f(x^2 + y^2 + z^2) = f(x^2)\*f(y^2)\*f(z^2) What type of function is defined by f(a+b) = f(a)\*f(b)? An exponential. So we find our distribution must be f(r^2) = exp(-r^2), which is a normal distribution. I hope that helps, if I have explained anything badly please say so!

Each of your coding adventures is very inspiring, love your content!

Thank you for producing such a quality work, I have never ever seen someone that explains something which is directly illustrated with a game engine like you! Coding Adventure = Masterpiece. 👏🏼

I cannot imagine how much work it is to write the storyline, code everything, take it apart again to "live" good for the video while perfectly narrating. You are one of my favorit tubers and I always have to restrain myself to not share your video with everyone I know! (Though I have shared them many times anyway)

So Marvelous ! The fact he employed real life laws and the fact they actually worked Is truly outstanding !!

I am blown away by this video. You made not only one of the best ray tracing explanations I've seen, but a really cool engine as well! I'd love to see this become a series, maybe touching on performance improvements and code optimization as well.

I've been thinking about the cosine weighted point distribution myself over these past few days. It's always a great time watching your videos and seeing all these things that I want to try out in future projects too!

This is some of the best content on UKposts! 🥳Fantastic production value, animations, pacing, and explanations!

Impressive to say the least. You're able to take complex subjects and turn them into easy to understand lessons that are also beautiful works of art. Really enjoyed this

this is amazing!!! it's so cool how each step builds up to a good-looking ray tracing implementation despite all of them seeming relatively simple compared to how complicated rt seems as a whole. you're really good at explaining things! i understand how it's ray tracing works much better now, thank you :)

Congratulations Sebastian, you are hereby certified crazy for doing all your animations inside Unity. You may add that to your CV for future job applications.

I'm so glad you came back to this after that ray marching video, I love your presentation and it's great seeing it come together so nicely

Can you try raytracing-based portals next time? Like, teleporting the ray instead of bounce.

These videos are truly exceptional. Really a part of the few content creators of true excellence.

Loved seeing all the reflections and colours being picked up! Fantastic video.

This was amazing. I have a moderate understanding of how ray tracing works, but your visualizations and explanations are so beautifully clear. Keep it up!

you've got no idea how much this video means to me, i've been trying to code a ray tracer helplessly for the past few months, thanks a ton :D

I'm always looking out for these videos, love your stuff!!

oh man, it is so charming and relaxing to watch your high quality videos. Keep up the good work! Thank you so much❤

im so impressed with the level of programming knoledge here, im a begginer programer and watching this video was not only relaxing but entertaing, although ( although i didnt understand alot of it) watching your breakdown and following your thought process really made me understand, keep going with this chanel!

Please a part 2 on optimising this and adding more features. It would be so satisfying to get this closer to realtime if even feasible

Man no way this is amazing, im always happy when you release a video

29:53 "Truly one of the artworks of all time" "Anyway, what's going on with this tomato?" I died here

I may have forgotten all the admittedly few knowledge I had about programming, and yet I'm deeply engaged every time you post a video! Loved all the simulations in this one

Things like this blow my mind. Glad their was people out there who created rendering like this so we could enjoy the fruits of it.

Your videos never fail to entertain me

This was such an educational video and the end results so amazing! I now better understand the concepts of specular and diffuse reflections. Thank you, Sebastian, for doing this!

This is the exact kind of thing that I love about programming. I recently made my first pathfinding program in pygame (using Sebastian's A* video), and seeing it work was the best feeling. I feel like making a game would give you that every once in a while, but with little experiments the whole goal is to get a single system working well.

The only channel i have notifications on for. Never dissapoints!

Was having a bad day, thank you so much for this video. Put a huge smile on my face to see the notification.

This is amazing. Filled with detail and excitement as you explain, it makes as I want to do it as well. Although could as well be a tutorial, it seems so entertaining and interesting watching what would happen. I subscribed and would like to follow and enjoy while you talk of the capabilities to accomplish. I did not know it could do so much, the programs. Thank you for making this and explaining along the way.

Such an awesome video. Love the thinking process and the video style.

Nice I always love when new videos are out

This is just a frivolous ammount of liquid GOLD! Wh-what the hell? I have been following you for a long time, but this Render Coding was AMAZING! I think it's been five years since I started modeling for a living in 3D and I, of course, understand how ray tracing works, but this level of detail was beyond my expectations, I learned a lot today! Thank you very much!!

That was the most concise video I've ever seen on how ray tracing works. Fantastic work :)

Many moons ago, I accidentally came across this channel when on a UKposts dive. 80% of the content flies over my head, but I find myself enthralled by each video! So interesting seeing it all come together each time!

Hey man just wanted to post a comment to express my love for your videos. Im currently in school studying software development but my love for programming and technology goes beyond that. I'm not the smartest guy and I'm not going to pretend to understand everything you do or say. But man I've learned ALOT. So far the most fascinating thing you taught me is the HOW math is actually used in creating all sorts of things. I've always heard that math is important but I never got an explanation for why or how. I appreciate and love everything you do and I hope you continue making videos like this for a long time. Much love ❤

His voice complements his programming and editing style so nicely.

I never understand the coding part, but I love watching for the adventure! The way he explains things and his narration is always so soothing.

I loved your video and especially the questions you ask yourself, the answers you give. It's so fun and extremely interesting ! Thank you

I love that you said “Suzanne enters the Avatar State” as a way of describing making the model’s eyes glow

Dear Sebastian, your channel's a delight, With knowledge gained, my mind takes flight, Your game dev tutorials, top notch indeed, But other topics, left unexplored, I concede. Yet the quality of content, I must profess, Is unparalleled, leaving me impressed. So keep on creating, keep on sharing, Your passion for learning, ever daring. Thank you for all that you've done, For inspiring us to learn and have fun. May your channel continue to thrive, As we journey on, to grow and thrive.

Been watching your content for 3 years now, yet every video manages to be more interesting than the last one, well done man

What a beautifuly done video. Everything was triple A studio clean from the video editing to the content. Truely an amazing experience!

36:49 “My computer is dying, but i think it looks nice.” Me when I set the game graphics to max on my potato computer

I love the coding adventure videos!

Very good video! Really nice to follow, good visuals, calm voice and - most important - highly educating. Thank you for your work!

The quality of these videos is through the roof. I can imagine how much work goes into each video and I'm honestly floored.

This channel is a good example of quality over quantity

You have a great understanding of code and programming concepts, and you're able to explain them clearly and effectively. You have a knack for debugging and solving complex issues and your attention to detail and ability to write clean and efficient code is impressive. I take you as an inspiration.

It's how you explain Ray Tracing step by step. Such a masterpiece. It will be on my all-time favorite playlist about Computer Graphics for sure. Thank you, Seb.

I think I've said this before in a previous video, but even though I have almost no idea what you're talking about on a technical level, I thoroughly enjoy listening to you explain it. Your obvious enjoyment of the subject is clear.

One of these days, Sebastian will accidentally make a triple A level game with procedurally generated everything with lifelike graphics, I swear...

Oh so you turned your PC into a space heater, interesting

A new Sebastian Lague video in my feed is the best outcome of opening UKposts. Wonderful!

Ok but the way you sound is so optimistic and calming I never can let go of a smile while watching - its almost like you are grinning while recording the audio!