Fraccio

THIS METRO TUNNEL SCENE IS A SINGLE HTML FILE. ABOUT 600 LINES OF CODE, ZERO 3D MODELS. Claude wrote all of it from a chat: the machine, the rings, the soil layers, the camera path, the captions, even the 4K MP4 export that runs in the browser. My part was the brief and the checking. Every key figure was checked against London's Crossrail tunnels: 7.1 m shield, rings of 7 segments plus a key, about 100 m a week. Where it shines: You can now visualize pretty much anything this way. A device, a process, a physical effect. An elevator, a wind turbine, a fire pump, a power grid. Where it falls short: First drafts needed fixes. Wrong details, jumpy camera, captions covering the scene. It checks its work with screenshots and scripts, so spotting flicker and other motion issues is on you. It's a schematic, no substitute for the ground calculations and drawings an engineer signs off.