AquaLux 3D, a new projection technology developed at Carnegie Mellon University’s Robotics Institute, can target light onto and between individual water droplets, enabling text, video and other moving or still images to be displayed on multiple layers of falling water. Using a projector and rows of water drop emitters, we create a multi-layer display that can be used for text, videos, and interactive games. Credit: Carnegie Mellon University Robotics Institute