Similar to the Cupola, the IMS reaches to the lower ring of the structure. Unlike the Cupola, the Fulldome stands on the ground and an aluminum door is used as the entrance. The fulldome provides a more enveloping, protective feeling, and projections can stretch over the whole surface of the geodesic dome. The ZENDOME can also be assembled outdoors: in this case, a heavy duty flooring system is used. Technically the projection system needs to be free standing.