Show HN: Ray Tracing in One Weekend v4.0.0

The linked article is about an open-source ray tracing project called "The Ray Tracing in One Weekend" book series. The project aims to teach the fundamentals of ray tracing, a powerful rendering technique used in computer graphics, through a series of step-by-step tutorials. The article provides a brief introduction to ray tracing, outlines the structure of the book series, and offers links to download the books and explore the source code. The goal of the project is to make ray tracing more accessible and help developers and enthusiasts learn this powerful technique.

Since this is a major new release (three and a half years in development), I think this should be ok for Show HN.

This release has lots of new material, fixes, and updates across the three books in this series. All three books are online and free, with accompanying code available from GitHub. Enjoy!