Reflective panels, mounted on an aluminium frame and suspended from a twenty-metre-high concrete vault ceiling in the Long Museum in Shanghai, formed a large square pyramid that floated two and a half metres above the museum’s floor. A spotlight positioned above the pyramid’s open apex cast a bright circle of light through the pyramid onto the floor below. Stepping into this circle of light, visitors could look up into the pyramid’s mirrored interior. The angled walls reflected floor, spotlight, and viewer vertically rotated, producing the illusion of a virtual cubic space.