A ray tracer, being slowly and carefully developed over time.
This is based on the ray tracer in C++ from the book Ray Tracing in One Weekend by Peter Shirley.
To compile this project, you will need to use nightly Rust (the current beta might also work.) Run:
cargo build --release
(Don't try a debug build; it's way too slow.) Then try:
time $(target/release/rt > test.ppm)
where test.ppm is the output image. (This will take a while.)