Graffiti murals can be truly amazing pieces of artwork, but when it comes to indoor graffiti-making events... well, those spray paints aren’t exactly fume-free, nor are they particularly forgiving to people trying their hand at the art form for the first time. That’s where the YrWall Digital Graffiti Wall comes in. Designed by startup British tech company Lumacoustics, YrWall consists of a video wall that users "paint" on using a modified spray paint can - it “sprays” infrared light, and is tracked by a computer. Much like Microsoft Paint, users can select different colors and effects from a palette, fill in areas with a given color, insert pre-made graphics, and delete their mistakes. When they’re done, they can save their projects, share them online using an onscreen keyboard, or even get them printed on T-shirts.