As in a dance, Optic's two supporting frames slide ideally to create a light system of staggered shelves: in the centre the shelves expand to accommodate large objects, while the side shelves are lighter and cantilever out. The shifted frames give the bookcase an interesting 3D effect and allow for different configurations in the space: side by side on the wall, overlapping or in the middle of the room placed side by side in an "L" shape as a room divider.