In any case, there's a reason for them not to match: a realistic exterior is going to be smaller than the interior. Reason being, interior tiles have to be much roomier than they would be in real life to prevent collision issues with the player, especially the camera. I initially made smaller tiles that had more realistic dimensions, but the camera was constantly bouncing off the walls in 3rd person, making the gameplay kind of jerky. You'll notice that the doors in the game are all very wide and the steps are about twice as high as they would be in real life. These are all optimizations and corner-cutting to get a good-enough semblance but they're not terribly accurate.