The illusion takes shape in the very moment when one embraces the idea of theatre. If the complex room as theatre is understood as non-existential, then atmosphere is conserved, reflexion established and boundaries are excluded.
It is essential, that abstraction becomes a construct of possibilities.

If the construct becomes self-explanatory through its active de-construction, it follows that objects are installed within, structures become legitimate as soon as the stage emerges as the place for assembly.

It is then that the action is granted meaning.

Nothing plays the biggest role.