Rail
    pictureSet
    rail_category
    secondary_collision_box = BoundingBox -- only read when bending_type = Turn

RailRemnants : corpse
    pictureSet


Rail pictureSet
    bending_type = "straight" or "turn"
    pictures = { --RailPieceLayers
        straight_rail_horizontal
        straight_rail_vertical
        straight_rail_diagonal
        curved_rail_vertical
        curved_rail_horizontal
    }
    
RailPieceLayers
    metals = Sprite
    backplates = Sprite
    ties = Sprite
    stone_path = Sprite
