He builds a ray tracing renderer from scratch, and I think it gives a unique background perspective on how he "reinvented" or discovered the recursive ray tracing algorithm, starting from the naive approach of starting rays from the light source instead of the eye point like we have it here.
A while ago I found out about ray tracing through a YouTuber called Sebastian Lague. Here's the video:
https://www.youtube.com/watch?v=Qz0KTGYJtUk&ab_channel=SebastianLague
He builds a ray tracing renderer from scratch, and I think it gives a unique background perspective on how he "reinvented" or discovered the recursive ray tracing algorithm, starting from the naive approach of starting rays from the light source instead of the eye point like we have it here.