The MyCloud3D and Catopsys project consists of the production of a 3D realtime visit of a future eco-district in Nanterre, developed by Bouygues (Construction). The visit will allow users to observe the surroundings of the future district, then to visit them with complete freedom of movement. Just like in a video game, the user will be able to discover the whole of the future area, including numerous green spaces, residential buildings, offices and shops.