I’m in the middle of this year’s 2016 Turkey Day MST3K marathon so I can’t look it up but I believe the Maul eyes were from the animatic that Spielberg made to choreograph the chase on Utapau.
Spielberg?
Roger Spielberg, noted animatic director.
Ah, right. I though that maybe you just accidentally wrote (Steven) Spielberg instead if Lucas.
http://movieweb.com/steven-spielberg-helped-out-on-revenge-of-the-sith/