Durchsehen Exp. 01 (Augmented Perspective) by Markus Kison and Daniel Franke (via)
“A camera fixed on the concrete cube sculpture recognizes the presence of human faces within its scope. With a randomized choice it will focus on one of the bystanders and adjust its movement to his; tracking the eye movements of the viewer, a software computes the corresponding angle of view projecting onto the cube the very section of the space the sculpture is blocking from the viewers eye; thus making the cube appear transparent.”
See video here.