They're using a three.js's tube: https://threejs.org/docs/#api/en/geometries/TubeGeometry https://threejs.org/docs/#api/en/geometries/TubeGeometry The texture

They're using a three.js's tube: https://threejs.org/docs/#api/en/geometries/TubeGeometry https://threejs.org/docs/#api/en/geometries/TubeGeometry The texture moves, simulating movement, if I understand things correctly, with a forced bend at the end to ensure the tube is never straight. And moving the points of the tube a bit to do the mousemove fly thing.