Swept-plane display
Script error: No such module "Unsubst". Swept-plane display is a structure from motion technique with which one can create the optical illusion of a volume of light, due to the persistence of vision property of human visual perception.
The principle is to have a 2D lighted surface sweep in a circle, creating a volume. The image on the 2D surface changes as the surface rotates. The lighted surface needs to be translucent.