Walk (1), Drone (2), Map (3). W A S D or the joystick to move, Q and E to turn, R and F to tilt, Shift for fast. "Solar rows" stands up the real mapped panel rows (OpenStreetMap) in 3D. "Build here" drops a 3D wireframe solar block at the map centre, fixed in real coordinates. "Survey" shows the onsite ground grid (LiDAR topography plugs in here).