Thunderbird

Drag to turn it; click in, then scroll to zoom. On a phone, turn and pinch with two fingers. Fly goes through walls and Walk walks it as a player would (W A S D, or the stick on a phone). Floors shows one floor at a time, or only the foundations, and the floor plan looks straight down on it. The moon turns it to night, the camera saves a picture, and pointing at a piece names it and its floor; the card under the view prices it and finds the cheapest way in, and the raid path button draws that way in. Built from the creator's Rusticated layout; lights, electrics and decorations are not shown. At 2,859 pieces it is bigger than the planner holds (2,000), so it can only be seen here.