Okay, so imagine that you're walking up the spiral stairs enjoying the scenery and the glass cone (?). You approach a door off to the side and go in--and suddenly you are in a Negilahn ambienced room gazing at Negilahn themed art. You finish browsing, and then head out into the museum again, the Negilahn ambience immediately disappearing as you exit the room. You head to the next doorway and suddenly you are in a Payiferen themed room with sanscrit pictures. You exit that room and are immediately returned to the museum ambience again. The next room you enter has a Dereno theme. (And I'm just using the pods as a convenient example, not to copy Cyan's museum strategy.)
Well, my mild concern with this approach would be that the ambience switches would seem to be rather quick, and might not give the player much time to adjust their mood between rooms. So what if we use some sort of "transition hallway" between the museum staircase and the individual rooms? Perhaps if the transition hallway was pitch black with an appropriately themed lit door at the end, and we started a gentle matching themed "hallway" ambience that gave way to the main room's stronger ambience when the player entered the room proper...? Or would there be a better way to reduce the shock of jumping in and out of ambience zones?