I don’t know if this is a well known fact, but I discovered it and thought it was cool so I figured I’d share it.
So I was messing around today trying to get some cool reflection effects for my wallpaper when I discovered an interesting use for the glass shader. If you make any object, apply the glass shader, and place it over the camera, you can make a bent or kaleidoscopic effect. Here is a rough example I made as a proof of concept off of an old model of a cup that I made for my first project. I included both the original and modified version for reference.
Obviously, the second one is not very good, but I do see some potential here.
The camera angles are the same on both.