A Pure Python Raytracer by Arun Ravindran.
Watch the video tutorial: https://www.youtube.com/watch?v=KaCe63v4D_Q&list=PL8ENypDVcs3H-TxOXOzwDyCm5f2fGXlIS
Read the blog series: https://arunrocks.com/ray-tracer-in-python-1-points-in-3d-space-show-notes/