I tried creating a custom ray/path tracing renderer. Featuring: maths, shaders, and cats!
This project was written in C# and HLSL, and uses the Unity game engine.

Source Code: https://github.com/SebLague/Ray-Tracing
Support the channel: https://www.patreon.com/SebastianLague
Coding Adventures Playlist: https://youtube.com/playlist?list=PLFt_AvWsXl0ehjAfLFsp1PGaatzAwo0uK

Learning Resources:
https://raytracing.github.io

Casual Shadertoy Path Tracing 1: Basic Camera, Diffuse, Emissive

Music Credits:
https://github.com/SebLague/Misc-Project-Info/blob/main/Coding-Adventures/Ray-Tracing.txt

Chapters:
0:00 Intro
1:08 Cameras and Rays
3:30 The Pixel Shader
5:02 Drawing a Sphere
6:59 Multiple Spheres, and Colour!
8:21 Two Types of Reflections
9:04 Experimenting with Randomness
11:14 Random Hemisphere Directions
14:11 The Trace Function
16:35 Testing Lights
17:55 Chair Thief
18:23 Progressive Rendering
19:54 A Simple Sky
20:49 Lambert’s Cosine Law
22:47 Cosine Weighted Rays
22:36 Triangles
24:52 Some Tests
27:14 Specular Reflections
29:59 Tomatoes and Glossiness
31:57 Blur and Anti-Aliasing
34:42 Depth of Field
37:14 The End