3D Printer motion visualization. Each video frame was individually rendered, then combined into a video. For 35 seconds of video, this took 20 hours to render, plus initial scene setup, which took an additional 2 hours. But there's nothing quite as satisfying as realistically showing a customer HOW your product operates, even before it's built.
Model courtesy of Nguyen Nhu Tuan, rendered by myself in Keyshot 9.