An empty plaza of dark boxes and a long floor with one huge painting projected across it from a single fixed viewpoint. Every surface fragment is pushed through that projector’s view-projection matrix and its clip coords sample a procedural street-3D picture — a glowing sphere floating above an open pit. From most angles the paint reads as a smeared, stretched road marking; the drifting camera slows to a near-stop as it crawls through the projector’s exact pose, and for one beat the smear snaps into a solid illusion that lifts off the pavement before dissolving as the camera coasts on. Hold the pointer to nudge the drift.