LeeThorogood said:
I think they showed the Rancor scene as an example of "black matt lines" being obvious when talking about the clean-up (fixing transparencies) of the battle on Hoth in ESB.
Exactly. The scene showed Luke being pinned down by the Rancor, during which Luke disappeared off screen because of the Rancor closing in on him in front of the camera. THAT's what I was referring to. It showed the matte lines very clearly, which was something GL wanted fixed for the 97 SE.