Cube is a 1997 Canadian independent science fiction horror film directed and co-written by Vincenzo Natali. A product of the Canadian Film Centre’s First Feature Project, Nicole de Boer, Nicky Guadagni, David Hewlett, Andrew Miller, Julian Richings, Wayne Robson, and Maurice Dean Wint star as individuals trapped in a bizarre and deadly labyrinth of cube-shaped rooms.
I just watched it for the second time (the first being about twenty years ago or more), and I made the realization they only needed one cube to film it up until the ending. Glad to learn it was a cube and a half.