Created for Making Future Magic, BERG together with Dentsu London have come up with this quite wonderful movie combining iPad and light painting. The team first created software models in Cinema4D. These were then rendered as cross sections, like a virtual CAT scan, making a series of outlines of slices of each form. These are then played back on the surface of the iPad as movies together with dragged iPad through the air to extrude shapes captured in long exposure photographs. Each 3D form is itself a single frame of a 3D animation, so each long exposure still is only a single image in a composite stop frame animation. See more here.