This video guide for The Talos Principle will show you how to complete the puzzle from World C called “Oubliette”.
I figured this one out by accident. This wasn’t the first puzzle where we needed to use something like a reflector or jammer to alter the path of a sphere, but I didn’t think of doing it here. The solution is to pretty much take that reflector that is outside and put it inside where the sphere is. These kind of puzzles are why I loved this game.