In theory, the walk in "Brother" shows our heroes entering the transporter room from a curved corridor and leaving it the same way, despite supposedly being in the secondary hull. In practice, we have to accept that there are cuts in that walk, even between apparent back-to-back phrases we overhear, so that the heroes can i.e. change decks; this would mess up the connection between the transporter room and the curved corridor as well, even when it really shouldn't.
Then again, many a TOS episode made explicit connection between Main Engineering and the curved corridor just outside, including IIRC the one where we see Main Engineering in the secondary hull (the * entity leaving the facility and all). Nothing much wrong with there being curves down there, especially if the shirtsleeves parts of the ship are but floating modules of sorts, sized and shaped for the things they contain rather than for the hull that contains them.
Timo Saloniemi
Then again, many a TOS episode made explicit connection between Main Engineering and the curved corridor just outside, including IIRC the one where we see Main Engineering in the secondary hull (the * entity leaving the facility and all). Nothing much wrong with there being curves down there, especially if the shirtsleeves parts of the ship are but floating modules of sorts, sized and shaped for the things they contain rather than for the hull that contains them.
Timo Saloniemi