Ray Tracer in SQL

A developer created a fully functional ray tracer using only ClickHouse SQL queries, with no external code or user-defined functions, that renders 3D scenes directly to PNG format. The ray tracer uses vectors as tuples, constructive solid geometry for shapes (cylinders, tori, spheres, boxes), and array operations for loops and variable binding, enabling parallel computation across CPU cores by keeping rows independent. The implementation demonstrates advanced SQL capabilities by rendering complex scenes including procedurally generated terrain, shadows, reflections, and chrome lettering spelling "ClickHouse."