Board — the Helsinki diorama the game is played on. Mounted on `mount_board` by the scene entrypoint. Generates the whole board as eight merged meshes and hangs them off its own entity as temporary children, so the scene file carries none of it and a reload rebuilds the model from scratch. water the sea, its shallows and the foam along every shore land the peninsula, Suomenlinna, the skerries in the strait streets the avenues and the cross streets route the paved tram corridor, its rails and the fork's arrows tiles the 43 counters of HL.TILES and their modelled icons city the blocks of flats, and the trams in their sidings parks the trees harbour the quays, the pier, the boats, the SkyWheel's deck One mesh per part rather than one entity per object: the whole model is eight draws, and a part can be turned off on its own to read the one under it. The board also owns the LIGHT over Helsinki — the late-afternoon sun angle, its warmth, and how much sky bounces back into the shadows — as the one place the diorama's tone is decided.