Still very much a work in progress. Expressions occur by changing a single sculpty that makes up most of the head. Talking uses an animated jaw with a single sculpt that changes to simulate phonemes.
It's been easier to consider this avatar as "me" since I got the expressions going to give him some life and personality.
There's a lot more to him, but that's something I'd rather talk about some other time. There's some history and oddities behind this.