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These videos are amazing. Thanks

good quality materials ! thanks for sharing

As a Graphics Programmer student, these are some of the finest and well explained videos you can find on TH-cam.

Excellent tutorials!

You are SO UNDERRATED my friend. Stay motivated!

Is it possible to use GSN composer offline?

gsn composer looks like amazing tool for studying CG concepts.

This must've been the best shader introduction I've seen so far.

These videos are by far the most in-depth and practical resource out there for game engine developers

great video!

Great video! You could do one about clustered rendering, which covers both forward and deferred approaches to have a large amount of lights without the caveats of the deferred shading and with savings in the memory bandwidth that the deferred shading often incurs on

ever think of gettig in to shader for vrc?

wow really amazing thank you!

these videos are worth gold, can't wait to see more

Thank you! It's really informative

Can this technique also be used for the specular part? Thanks again for these videos. Looking forward to watching the next ones.

That was excellent.

I can reproduce the diffuse part by Sampling the Environment Maps method in this video, but how should I handle the specular part? Can you provide some relevant articles? Thank you very much!

In the `directionToSphericalEnvmap` and `sphericalEnvmapToDirection` functions, used z axis as up direction. But in OpenGL, y axis is up direction. Do we need to swap the y and z axes？

Hi, very nice video! I just have a simple question, the output value of the fragment shader is RGB color or linear radiance？Because I saw that the `outColor` ball light was called `rgb2lin`, but when coloring the object, `lin2rgb` was also called, so I was confused？

Thank you for publishing this-really appreciate the clear explanation and walkthrough.

One thing I should say, if anyone referencing the linked GSN repro in their own project, beware of the 0 alpha value when storing the final frag colour. Took me a while to debug that :D I guess GSN composer, or that particular project file, has alpha blend turned off or something

Great video, thanks! I've been messing around with hard to understand shadertoy noise functions, and this has helped alot. Am I right in thinking that to get the gradient for the actual pixel, I just need to interpolate between the 4 gradients, just as you did with the values you calculated from the gradients?

This is so good thank you

Some German snuck into your slide #21.

very nice toturial ！

Nice and detailed video! Just a hint: you didnt need the position buffer, its much faster to reconstruct the 3d position from the depth buffer with the inverse camera matrix (it's saves a lot of gpu bandwidth)

thanks!

Excellent video! But how to render shadow when using image-based lighting in physically based rendering?

I just got this recommended: th-cam.com/video/QVbOp1h-Jb4/w-d-xo.html

the goat has returned

Thank you for the work you put out!

Excellent video as always! ♥

Great to see you back man! Loved your IBL videos!

thanks for the very helpful videos

Excellent explanation, thanks for all the effort you put in those videos :)

thank you for sharing

I've a second question, thanks for calculating these radiation quantities for point light! Are you going to do the same for directional lights, later in the course? Because I'm having difficulty in wrapping my head around visualizing radiant intensity of a directional light (i.e. a light model that does not have position, and it's direction is constant through space, a good approximation of sunlight on earth's surface) because I can't surround its source via spherical shell.

Hi professor! Thank you so much for making this very high quality resources publicly available. I'm studying PBR rendering at the moment and found your videos through a TH-cam search. Yours is the best resource I was able to find that involves both math/theory and code/implementation. ^_^ I got confused by the meaning of theta, and definitions of and relations between irradiance and radiance. AFAIU, on slide 14 when you explain irradiance, around t=18:55, theta is the angle between the incoming light direction and the surface normal. Again in slide 14, when you explain radiance, around t=20:30, theta is the angle between the outgoing/reflected light direction (view direction) and the surface normal. you say that's why we multiple dA with cos(theta), to get the projected area. Again in slide 14, when you explain the relationship from incoming radiance to irradiance, around t=22:18, theta again becomes the angle of incidence. oh! I think I got it now! In the third case we are talking about the incoming radiance, but in the second case we were talking about outgoing radiance. We always use theta, but meaning of theta changes depending on whether the radiance we are interested in is incoming or outgoing wrt surface. Lol, it took me a few days to finally grasp this and that happened while I was writing this question. :-) I'm glad I posed the question. Still gonna leave my comment here in case anyone else got confused about the same concepts. One tiny bit confusing aspect that was left in my mind is that, the outgoing radiance, the essential quantity that we are calculating in our shaders, by definition has a cos(theta_prime) in it. (called it prime to distinguish it from angle of incidence). However, AFAIU, by definition, BRDF handles the "projected area" for that case... I mean, the integral to calculate L_o(v) is kind of a transformation of irradiance from l-space to v-space via the BRDF kernel, and by definition, the direction v is into our eye/camera. so, theta_prime is always 90. At least, this is how I'm going to sooth my mind. :-)

Hi. I was typing "understanding registers in shaders" in the search bar in TH-cam and got to your video. r1, r2 etc are temporary registers; o0, o1 etc are output register; v1, v2 etc are input register (for vertex shaders 3.0). I would really like to understand this because I want to stereorise shaders in games. This means I want to edit shaders of games through DLL wrappers. Do you have any videos or sources that explains what these registers do and what they mean in ASM or HLSL language..?

This is an awesome video series thank you so much at 7:05 you said that use of three primary colors has something to do with the fact that we have 3 cones where can we get more info on this topic? i though that we use RGB model mostly for technical reasons (im guessing its easier/better to produce red green and blue diode screens than lets say cymk) is there really a link of some kind between how our cones work and how rgb models are defined?

A truly great work, thank you for sharing your work with us. I have learned so much from your series.

This series is a truly phenomenal resource. Thank you!

You deserve more views and likes friend! Awesome content!!! Thank you very much!

Best of the best, thank you teacher!

This is the best class I've ever heard, thank you!

I was thinking to precompiute the brdf integration map as an attribute. This can save maybe gpu resource since than the texture is an attribute at i guess point level! 🎉 thanks for all those lessons. Anytime i have time i come here to become a better artist! Little pearls each time. Thanks!!

This isi so cool!! is there a way to out put the result on an external screen? have a quad mapper as web app can be pritty handy!!

That's the most clear and convincing learning resource for cg i had ever seen.

Many times before I got stuck with radiance and BRDF math, but this video finally allowed me to understand it. This is the best video on lighting computations on TH-cam. Big thank you!