english: I met these guys called GRL, Graffiti Research Lab, and they have a technology that allows them to project a light onto any surface and then, with a laser pointer, draw on it, and it just registers the negative space.
non_english: Spoznal sem fante iz GRL, Laboratorija za raziskovanje grafitov. Njihova tehnologija jim omogoča projiciranje svetlobe na kakršnokoli površino in risanje po njej z laserskim kazalcem kar izstopa kot negativ.