// I couldn’t resist finding the video for YrWall, my brother (who is an artist) would love this tool. As the website explains, it is an interactive drawing art tool where users create virtual digital graffiti on a large wall using a modified spray paint can. It’s basically graffiti with a can that contains no paint, only a button and IR light source tracked using a computer vision system. Comp of stimulant: It’s the brainchild of UK-based interactive visual art co Lumacoustics, which has its roots in the Bristol street art scene. I want to try it!