I was referring to possibly not knowing about Ray Tracing which is a technique and a subset of the field of computer graphics and thus possibly not understanding its computational complexity, I don't know why you're upset at me.
Even kids know what ray tracing is these days, it's used in video games to sell graphics cards. Teenagers write ray tracers in undergrad classes.
This example is a cube and plane with one light. It is lines from the camera checked for collision against triangles then a line from the collision point checked against a light. Checking for collision against a triangle is just checking collision against the infinite plane and checking if that point is inside the triangle.
What is the "significance" you are talking about? This is something common with an uncommon display.
