Viewers cast shadows that evoke atmospheric effects, such as seeing one's shadow cast onto fog.
Because of the
unusual method of generating the scenes — different from what viewers normally associate with moving imagery — even while standing right next to the halogen lights, viewers tend to think that the imagery originates from a projector.
the imagery originates not from reality but from more humble means:
the entire aurora scene is created from a small fold in the material. Using the material as volumetric reflectors makes it possible to create unpredictable and complex scenes from simple shapes.