EvilMike, episode 1 and 2 are from years back (2005?), and it took 2 years (right?) just to get to episode 3 and 4. When a long period of time passed, the art direction of artists changes. That's how it is, you see it in every kind of art, it makes it more interesting and enjoyable. I know we speak of level making, so you may want the experience to be the one of a set, but I think leaving the past is what best, so a player can see the changes from episode to episode.