--> receives free lesson --> shamelessly complaints about audio quality... Seriously? Thank you Martijn for this super useful video!

Looks like Christmas came early! This is the best explanation of ray marching I have come across. Thank you!!

One of the best explanations i've ever come across, thank you so much!

Thank you for this amazing tutorial! I successfully implemented my first ray marching shader on my renderer. It looks awesome!

This is such an amazing explanation of the math behind raymarching - thanks so much! Everyone should sign up for the Patreon!

Awesome explanation. You make some top quality content, good sir. Much appreciated!

Had been meaning to try this technique for years, but only just got around to it. This video was an amazingly good sanity check. Thank you so much for making it!

The way you explained it makes a lot of sense and I feel like I understand *how* everything works, so thank you for that! You're a great teacher!

This is an amazing explanation of the marching rays. Awesome!

Thank you so much for this series. You help me experience joy of all that ❤️

I was watching a series of videos on Ray Marching lately and all skipped on many details and things, focusing only on cool effects and fractals, thankfully i found this video to help me understand all the basic elements Amazing work!

Awesome! This sorta stuff is a bit beyond me but I like knowing the general gist. This was so well made I really feel like I do know the gist now, thanks!

You made it again. Great entry explanation of raymarching. Concise, simple, easy to understand. Neat neat job, congratulations and thanks for your work.

This channel fits like a glove. Thank you for the work !

This is exactly what I was looking for - please continue this path!

I replicated this in Blender with the node editor. It is probably the most impractical thing I've made, but it was fun. Thanks for the great explanation/tutorial!

Awesome. How you explain the thought proces about the inner workings. The logic, just wow!

That's great stuff - thank you for sharing this, gotta say that I love your presentation style - you hit the nail on the head for my preferred style! Thanks again man; I am really looking forwards to checking out your other content!

Absolutely amazing! Now I finally got the idea of raymarching! And it is suprisingly simpler than I think! Thanks mate! Keep your good work!

I've been waiting for this video for years! You cannot comprehend how happy I was to see this in my subscription feed today! Haha thanks so much!

Excellent video covering a lot of the basics! Should be the first video in any Raymarching playlist ;)

Just found this tutorial and even though I'm not doing it in a shader (I wanted to make it in python) I find this very useful so a big thank you!

This really is for dummies. Thanks for the amazingly clear explanation! Would love to see more stuff coming out :)

Superb! Really dig the code being written as you go along.

damn you're crazy... explained such a complex topic, that even I could understand everything you said with only one time viewing the video... Big props

WAY cool my man ! I find this extremely interesting, exactly what I was hoping you'd eventually cover. Long time no see. It seems I wasn't getting alerted, damn ty notifications. I got a few vids to catch up on anyways. Thanks for sharing, you're so awesome at explaining these things.

Very helpful! Thanks for taking the time to make this.

I'm impressed what Ray Marching can do! Feels magical

Your teaching method is the best. Thank you very much

I really like that you continue to make these very helpful videos ... Thank You :)

Thank you! This is one of the best tutorials for anything I have seen in my life. Simple enough to grasp as a beginner, yet it's simple without glossing anything over so you really get to understand everything you learn here. An excellent starting point for anyone interested in ray marching!

Great work! I tried to understand it by myself, looking at examples on Shadertoy, but I failed :D Your explanation is so easy to understand! Thanks!

Great explanation. Your graphics really helped get the point across.

This chapter is really super useful, thank you again!

The fact that you can create something like this out of small samples of code and some very neat core ideas, makes me believe that it could actually be possible to simulate a world so realistic people don't notice right away they are in one

Awesome vid. Never really knew how raymarching worked

Really interesting and well-made video, thanks a lot!

Thank you for the clear explanation of an otherwise complicated topic!

Thank you ! your skecth/diagram helped me a lot. Great explanations

Thank you! Very well explained video. Great pace for a newbie to ray marching. Thumbs up!

Thank you so much. Your teaching skills are wonderful!

OMG this is magical. Thank you for making this

thanks for this cool tutorial. really well done

Excellent tutorial Martijn, bedankt!

nice tutorial ~ and happy new year

wow! really nice explanation, Thank you!!

Congratulations! Great work.

Distance functions are where it’s really fascinating! For interesting objects the distance functions are fun.

After read dozens of articles and videos, I finally found one that I can understand. Thanks a ton! m(_ _)m

holy shit the sub bass in this is wild!! lol anyway, thank you so much for this amazing walkthrough. extremely clear and organized. thank you!!!!

Awesome video, super easy to understand.

Awesome tutorial, so easy explained, that even a 9th grader (me) can understand it! Thank you so much!

Very nice and clear explanation. Cheers

thank you for a very consistent explanation :)

Thank you for making great stuff!

Thank you for your tutorial. It really helps me a lot！

It is a really good video and great explanation. Thanks a lot.

This is really really helpful, thanks a lot!

Very nice explanation, thanks a lot!

very helpful, thank you! btw the keyboard shortcut to run the shader is alt-enter

Very cool video and awesome channel ! thx !

I'll learn many things from you, thanks man

I love your videos, truly. Excellent explanations! I do feel like they would be easier to follow with actual variable names. I realize most shadertoy authors go for a more codegolf approach, but it'd be nice. Keep it up!

very well explained, thank you!

Great introduction. Thanks!

Very clear and interesting. Dank je wel.

Powerful stuff. Thanks for sharing.

Yeaayaa, omg I'm so glad you exist! Not knowing how to program shaders is a very subtle restriction like.... sheeesh describing how it feels to be limited by it is tough... Ok, it's like loving to work on cars, but you can't touch the electrical systems. You can master whatever as long as wired parts remain a mystery. The longer you do it, the more apparent it becomes that simple fixes can become ugly kludges, large-scale improvements rarely feel perfect, and when you're done... there are haunting moments when you just gotta hope the lights come on, the car will start, and it won't die in front of anyone later on.

I'm gonna learn so much from you it's carzy

Thanks for the video, it seems so simple now

Thanks for these videos !

I'm addicted to your videos. Your newer ones don't have this issue, but the keyboard thumps that get picked up by the mic here are really distracting. Seems you've been more mindful of that since then though. Thank you so much for uploading this stuff; will support when I can!

Absolute great, thank you!

The one thig that does not stop to amaze me is how little code is needed to create wonderful graphics.

Great introduction to ray marching. Small nitpick: While your function for computing normals works for your sphere case, I recommend using central difference instead of forward difference like you did when computing the surface gradient. You also shouldn't normalize, but instead divide your gradient with the epsilon. In most non-trivial cases the actual gradient is a better surface approximation than the renormalized vector. So you get vec3(f(x+eps,y,z)-f(x-eps,y,z), f(x,y+eps,z)-f(x,y-eps,z), f(x,y,z+eps)-f(x,y,z-eps)) * (1./eps). It is also useful for people to know that because surface normals are done with gradients, it is extremely important that the distance function is smooth everywhere. Sharp corners, discontinuities and stuff like that have a nasty tendency to mess up lighting. It is sometimes helpful to render the gradients as colors for debugging.

great tutorial! thank you very much, subscribed!

that keyboard rumble caused my glass to be bounced from the table by the thundering keystrokes coming from my sub

Fantastic lesson!

Awesome tutorial. Thank you!

This tutorial is amazing!! Thanks!

It can be optimized. If in first you use classical projection approach, then you can segment all screen to fragment belonging to different object. Then if you process all segment separately, you can march few ray simultaneously because near ray don't intersect object too if central ray has enough empty space nearby.

*Starts explaining..* me - *instant like*

Great video!!!

thank you so much !!!!

This is truly incredible.

Really enjoying your videos.

Subscribed without wasting a second

great video! thank you

Thanks for the awesome video. I'd love to see a video on how you debug when you face an issue.

Amazing video. Shadows too! The only thing bugging me is that I think the vector between two points on a surface is a tangent, not a normal . You definitely treat it like it’s a normal (since you dot it with the light direction), but I can’t see why it works (and it clearly does!). What am I missing?

Hey great video with a clear explanation :) If you wanted to sample a texture at the hit position, how would you go about converting the hit pos into a uv coordinate? Thanks

Well explained. Super Cool!

Nice video. I'll try for sure :)

Great video! Came here from Coreteks

really well explained!

Thank you for your videos! Maybe you could look into the topic of reflections in ray marching?

Thanks for the great video!

Thanks for the great content!

Great job!!!