Laser shows draw with a single moving point: galvanometer mirrors steer the beam so fast it traces persistent shapes, vector graphics in the air or on screens, plus the aerial fans and tunnels haze makes visible. Planetarium spectacles like Laserium (from 1973) and rock productions built the tradition; Pink Floyd made beams part of the genre’s iconography.
The medium is vector, not pixel: everything is paths, closer kin to an oscilloscope than a projector, with brightness bought by beam power and safety regulated accordingly.
Modern rigs sequence lasers alongside lights and video over standard show control, but the aesthetic remains its own: pure saturated geometry no screen can fake.