The work of Mexican/Canadian artist Lozano-Hemmer provides what are probably the best-known examples of contemporary interactive art, in which cutting-edge technologies such as robotics and video and ultrasonic sensors are utilised to create increasingly ambitious participatory projects.
Vectorial Elevation (above) was premiered in Mexico City in 2000, but has since been shown in various cities.
Using powerful searchlights to create light sculptures in the night sky, the form they take is controlled by members of the public via a website equipped with 3D simulation software.
Completed designs are then electronically relayed to the searchlights, and simultaneously appear as mocked-up images on personalised web pages along with the name of the light-designer, comments and dedications.
tracey emin prints