seven said:
While looking out the front windows of the bridge of the Star Destroyer we should (shouldn't we?) see the main hull of the ship (the nose), but we don't. On the Executor as well, we should most definitely see the hull through the windows since it is much longer.

I'd have to absolutely agree with Siliconmaster483 (and vaderios too, if he is making the same point) on this one seven. Every time we see 'Bridge' shots of inside either the 'Avenger' or 'Executor' sets in 'Empire' and 'Jedi', the camera angle is fixed at a certain low enough, straight-on 'point-of-view' so that we just wouldn't see any of the hulls in those particular shots.

This goes for the shots of Vader on the 'Executor's' Bridge when we first see him on it, as well as when we last see him on it, even though his ship has a very long hull. We just aren't positioned at enough of an angle to see any of it in these shots, so no extra work for Adywan necessary.