Maraytr is a ray-tracer written with high focus on algorithms and data structures rather than on performance. I decided to make it as revision and deeper understanding of theory and math behind ray-tracing. And also because ray-tracing is fun! The core was written in four days and without third-party libraries. The scene is represented as CSG and supported primitives are sphere, cube, and plane. It is possible to do basic boolean operations like union, intersection, subtraction, or xor.