This is implementation of series called "Ray Tracing In One Weekend" by Peter Shirley, Trevor D Black and Steve Hollasch.
Besides the steps from books, I've added .obj model importing to allow for more complicated scenes, as well as simple optimizations such as using OMP for major raytracing loop parallelization. This program outputs a .ppm image based on the scene setup inside main function.
https://raytracing.github.io/ - link to the series website