You also have to worry about light & shadows from objects outside the ship casting inside the ship (ex. another ship, rocks, debris). If a giant ship blocks the windows from the sun, the sun is still going to cast through because the other ship is not actually there, it’s two images being overlaid.
Come to think of it, you would be rendering much more than you need to because any pixels from the scene capture that are blocked by the interior will go to waste; it’s basically forced overdraw.