https://raytracing.github.io/books/RayTracingInOneWeekend.html

• A Rust take on “Ray Tracing in One Weekend”, aimed at learning rather than production.
• Data structures are intentionally open and straightforward — minimal encapsulation and guardrails.
• Examples may use unwrap/expect; production code should prefer structured error handling.
• Passing by value vs by reference is handled pragmatically; readability takes priority.
• Small Copy types often go by value; borrowing or cloning is used when it improves clarity.
• Inputs are assumed to be well‑formed (e.g., UVs in [0,1], RGB in range).