Close icon Two crossed lines that form an 'X'. It indicates a way to close an interaction, or dismiss a notification. A 3D artwork created in Tilt Brush Chandana Ekanayake / Google The tech giant said it would make the game's code available online. But the move represents another blow to Google's virtual and augmented reality aspirations. Google has shut down its development of 3D painting app Tilt Brush, marking the latest in a string of virtual and augmented reality disappointments for the firm. The tech giant acquired the firm behind Tilt Brush, Skillman & Hackett, for an undisclosed sum in 2015, praising its "innovative approach to 3D painting." At one point, it hired Tilt Brush Artists in Residence.