team_negative1 said:

Yes, the original matte lines and boxes are visible in a lot of the shots.

==========================================

You can see a lot more in the ESB deconstructed raw version.

Team Negative1

And also, Harmy's despcialized was based on the SE. In some scenes he recreated matte-lines, but usually the SE composting was used. In this scene, for instance, the placement of the tie fighters is quite different between the theatrical version and the SE. In the SE the two the the left are more level, and the other one is placed further to the right than in the original theatrical version. This would have been one of the changes made for the 1997 edition that the director agreed to (although how much involvement he had in Lucas's decision making is debatable).