Photo credit: Reddit
Created by Numen/For Use, N-Light Membrane is basically a giant infinity mirror-like cube that boasts six surfaces, with three of them made of flexible membrane (foil mirror) connected an air tank and a compressor. The other three panels are one-way mirrors, also known as semi transparent spy-glass. When the air tank is inflated or deflated, the membrane turns convex or concave, deforming the reflections within. Continue reading for two videos and more information.
Here's a bit more about Numen/For Use: "Numen/For Use is a Croatian-Austrian design collective working in the fields of scenography, industrial and spatial design and conceptual art. The group first formed in 1998 as a collaborative effort of industrial designers Sven Jonke, Christoph Katzler and Nikola Radeljković under the banner For Use. In 1999 they established Numen as a collective identity covering all projects actualised outside the sphere of industrial design."