Making him more transparent just isn’t on the books, is it? I could go somewhere in between on the color but that vibrant doctor manhattan blue needs to go.

EDIT: it just occurred to me on the audio side of things that when Obi-Wan speaks as a force ghost in Return of the Jedi there’s a bit of a reverb that Luke doesn’t have in his scenes as a force ghost, there’s an opportunity to play around with either trying to mimic the original or put a modern spin on it. I slapped together a very crude example.