My wife Kara & I did a couple of Style Guides for Jim Henson a couple of years ago before I re-joined Disney. This is a small sampling of it. The art you see here was executed in Adobe Illustrator......yep...that's what I said.....Illustrator.
I had to get really familiar with the gradient mesh tool! It was a fun project and I think the show is still doing pretty well for Henson on PBS. Why wouldn't it? Dinosaurs and trains? All they need to add are some race cars and spaceships with heavily armed trash talking mutant alien zombies and Ba-Boom! Boy Heaven!