Acrylic on canvas, custom software, projector, camera
A camera mounted on a tripod is taking pictures of a canvas hanging on a wall. The pictures are then passed on to a computer, which uses custom written software to process the image in some way. The processed image is beamed back on the canvas with a projector, and the painter is given one minute to paint what is projected. Then the process is repeated, untill the program decides that the painting is done.