I threw together my mock up. I forgot to look for any good landing ship shots, so I just used what I could find on Wookieepedia, which was an Acclamator Star Destroyer from Episode II. It's not pretty, but it gets the idea across.

It could stand to be even further off the screen, or smaller. I think this shot could do with some sense of motion, because it is completely still (which may be good for the dread factor and to balance it out with the Rebels scrambling in the shots previous and following). But I think some subtle motion wouldn't hurt.

EDIT: Another version: