Ok:
Something that is interesting.
I was looking the mattes and the live action sets and they have some differences.
I tried to match as match i could with both ways to make the thing work.
The bridge have different panels in the close ups than the matte.
As we see in the only live action piece (vader and a little piece of the road) the bridge is a bit reflective. A BIT! so some slight refections is a nice touch.
Now when vader comes to ask for the tractor beam the room he enter have different shape that we saw it in the matte. I made an efford.
Plus notice the black line that conects the two pylons. its missing in the close up with the lines in the floor.
Also the pylon should overlap some stuff and not showing to be in the same level.
In further notes i add some lights to gain a bit more life.
I add the missing window in the close shot.
Now the bridge is more symetrical.
Oh and i replaced the poor star destroyer with one from a later shot.
And in case you miss the differences:
Edit: crap, I forgot the little line over the little window...
Next time
-Angel