I dunno, maybe poured concrete, maybe some type of linoleum, maybe something like this: No prison/sanitarium bathroom tiles anyway. For sculpting, you could try sculptris. http://www.drpetter.se/project_sculpt.html It's very rough ATM, but still a funky toy. Or you could go and use PS to add details in the normal map,…
Yes, the scale of the screws also makes these pieces look more toy-like. The X (or philips head) design seems very Earthly and familiar. I would like to see some transitional piece where these attach to the floor too. The concept doesn't really address that but you could have brackets or a mounting plate that connects…