Based on tutorial from https://bheisler.github.io/post/writing-raytracer-in-rust-part-1/
Make sure cargo is installed.
cd raytracer/app
cargo run scenes/test.yml out.png
In release mode the raytracer runs a lot faster.
To build for release mode:
cd app; cargo build --release
To run:
cd app; ./target/release/raytracer-app scenes/test.yml out.png