Time Machine

The final project for this unit is to create a time machine using all the skills that I have learned. It has to have a normal map, AO map, roughness, metallic and an albedo map. The brief is fairly broad as a time machine could be anything which gives me lots of options.
I'm basing my concept on the radio series 'The Hitchhikers Guide To The Galaxy' and means of time travel that is cheap, random and possibly dangerous. Like actual hitchhiking.
It's basically a portaloo sized cubicle which is cramped, uncomfortable and filthy that has no co-ordinates or time zone. When activated it will transport the user to a random place in time and space.
I have already settled on a design after some quick silhouetting and concept art.