The supporting geodesic structure is made up of a triangulated spherical that fit perfectly one into the other. The auxiliary framework supports 6433 pre-formed triangles of polished stainless steel that reflect light as a mirror. The triangles form the cover for La Géode, making it look like a mirror reflecting everything around it. Each triangle has been polished individually; the polishing was taken particularly seriously to ensure that the light had identical polarisation on each one.
The enormous dome of La Géode conceals a 400-seater cinema complete with a giant hemispheric screen measuring 1000 m2 across and an IMAX format. Movies last less than one hour.
