Re: Darth Vader life-size Bust
Yeah, Yoda's eyes are the weakest because of how they were done.
While I have no experience with glass eyes, I imagine the realism is really there.
While right up close, inches away from the faces, the Sideshow painted eyes aren't like "oh how real" like glass ones probably are, from a normal viewing distance, the gloss and gaze are fantastic, Maul's eyes are always piercing when I look at him, Palpatine looks full of rage, Grievous looks pissed.
Proto eyes have always been much better than production with the Star Wars busts, so expect a slight drop off in detail, but the overall affect will still be there.