That bunch of crazy kids working out of a warehouse in Van Nuys pioneering the FX tech that will rule the next two decades on impossible deadlines were only human. 😃
Artoo’s panels were black because the blue ones would have been transparent in front of the blue screen.
I know how awesome FX guys are. 😉 Having said that George Lucas could’ve fixed R2’s panels and the Y-Wings having no droids in the Special Edition of Star Wars and he didn’t. He’s a turd.