OpenGL - PBR (physically based rendering)

Рет қаралды 30,345

Күн бұрын

Code samples derived from work by Joey de Vries, @joeydevries, author of learnopengl.com/
All code samples, unless explicitly stated otherwise, are licensed under the terms of the CC BY-NC 4.0 license as published by Creative Commons, either version 4 of the License, or (at your option) any later version.

Пікірлер: 26

@harald9676 2 жыл бұрын

I went through several of your OpenGL videos last night. I have to say you present some of the most clear and correct content on the topic I have ever come across. No waffling, straight to the point and easy to understand. Thank you

@zin3408 4 жыл бұрын

i can not put into words how much i needed this thank you so much!

@doriancorr 8 ай бұрын

Brian, I greatly appreciate the work you put into this subject and the accompanying book. It is concise, explained well and most of all touches on topics without over complicating them. Kudos to you!

@Mcs1v 4 жыл бұрын

Another well detailed rendering tutorial, nice job! ;)

@ashwanishahrawat4607 2 жыл бұрын

Thanks for the explanation the shading, technique and the code.

@Vagelis_Prokopiou 4 жыл бұрын

Thanks for the videos Brian. Really informative.

@DasAntiNaziBroetchen 2 ай бұрын

"Finnell effect" I am dying

@NrNi9e 4 жыл бұрын

Very good explanation, thanks!

@whynot-vq2ly 4 жыл бұрын

I wish I could give more thumbs ups, thanks for this great explanation

@user-yc9xk7yw3g Жыл бұрын

If i'm not mistaken, the division by PI in the diffuse component and division by 4 * NdotL * NdotV is the normalization factor for keeping our NDF normalized (equal to 1)

@beaumanVienna 2 жыл бұрын

5:50 k is a function of alpha, (alpha+1)^2/8 for a direct light source and alpha^2/2 for image-based lighting Regarding the term GGX, this is so funny, it cracks me up every time I see it. Nobody knows what it means. As in not a single person on earth. My theory: the guy who invented it was drunk and wrote it down. The next morning, he couldn't remember anything but still sent the paper to Disney. That's what happened.

@stephenkamenar 2 жыл бұрын

finally. i always wondered what pbr was. was it gpu hardware, a specific shader, or just a loose guide for standardizing material properties

@beaumanVienna 2 жыл бұрын

The line kD = 1.0 - metallic threw me off at first, but maybe now I understand. So kD+kS=1 is for dielectrics, however, conductors have also some kind of a grounding term (e.g. kD+kS+kConductiveGrounding=1)?

@kingwolf70 25 күн бұрын

At the end of your video it looks like you're not correcting the gamma on the Albedo textures; I believe that should happen, no?

@aussieexpat 4 жыл бұрын

Pbr is so hot right now.

@GeorgeTsiros 11 ай бұрын

4:18 how can the sphere reflect light from a point of its surface that is not even exposed to light? images for α 0.1, 0.3 and 0.5 i can accept, but 0.8 and 1.0 must be incorrect?

@thehambone1454 Жыл бұрын

How would PBR work for one directional light, this is for just point lights, correct?

@baileyharrison1030 4 ай бұрын

Use the directional light direction vector directly as the light vector. Ie, don’t subtract it from the fragment position

@Antagon666 2 жыл бұрын

What boggles my mind: is not a N dot V always negative ? Since N points outwards of object and V inwards, so the angle is always greater than 90° isn't it ?

@baileyharrison1030 4 ай бұрын

Confuses me too. Though I’ve noticed most shaders calculate the view vector as pointing away from the fragment instead of towards.