doubleofive said:

Where'd it come from?

It's in "The Making of Star Wars" by J.W. Rinzler.

The caption reads:

Millenium Falcon in hangar: "There is a quick shot when Leia says, 'You came in that thing?' [bottom left] And there is an establishing shot that is a little bit longer at the beginning [top left]. That quick cut was one painting, and the establishing shot was another [right, with details, middle]. There we once again reduced the plate, added onto the sides, put the top of the opening in for the shaft going down the center, all sorts of little goodies, lights and things like that. I used the original plate shot in England, the stormtroopers running up, and then I shot the miniature on regular 5247 film in a still camera, single-lens reflex. That I rear projected and put the miniature together, matched it up size-wise, added some painting so it would match and blend, and put those two things together so it's really the stormtroopers running up to the side of the set, which is connected to the miniature. That one worked well, too." - Harrison Ellenshaw

Note that this is just a crummy photo taken from the book, so it might be skewed or bent a bit. But yeah, the two on the left are the ones in the film, the big one doesn't seem to be used at all...

And Harmy, do you know about these?:

http://makingfx.net/archives/406
http://makingfx.net/archives/835
http://makingfx.net/archives/1200
http://makingfx.net/archives/1241