Things have got...rather complicated. This is totally planned though, of course. Everything is still fully in control. Ignore the sirens...they're just...um...part of the illusion. Yeah, we'll go with that.
Information:
(Previous rules from the other testing partly apply, though some mechanics such as gravity do not appear in this facility)
The mirror cube and the reality cube can have slight differences, for example, portals are not in the same place.
The reality cube can have paths that appear invisible in the mirror cube, so both, essentially, become mirror cubes.