For Infinity ITS tournaments, this is a dead-simple Objective Room that can be flattened for storage and transport. The room is 8" x 8", as the ITS document specifies. Each of the 4 doors has a base to help it stand on its own, and is removable. The engraving has the ARM, BTS, and STR of the outer walls and doors for easy reference, should you decide to force your way in the hard way.
Infinity is a trademark of Corvus Belli S.L.L.