Westwall-Lapse is an interactive 3D stop-motion application. Users navigate through a timeline by moving physically, while an infrared camera measures their distance. The closer the user is to the sensor, the further the animation advances; when the user stops moving, the animation stops as well.

The Westwall was a defensive line constructed during the Second World War. This line stretched over more than 630 km (390 miles) and comprised over 18,000 bunkers, tunnels, and anti-tank obstacles. The network of defensive fortifications extended from Kleve, on the border with the Netherlands, across the western frontier of the former German Reich to the city of Weil am Rhein, on the border with Switzerland. It was planned in 1936 and built between 1938 and 1940.