In this clip Ewan talks about how making the prequels was difficult because of all the green/blue screen
Ewan McGregor’s first movie job after ROTS was The Island, and I vividly recall him saying in interviews that at first he was reluctant because he was exhausted from having to act in front of blue/green screens and expected much the same thing with an effects-heavy movie, but Michael Bay reassured him that that wouldn’t be the case, and McGregor admitted it was a liberating to work on real sets and locations and having real things to react to instead of having to imagine stuff that wasn’t there.