Can you do one more version that looks like an wooden pallisade, so can be used for orcish walls.
Changes doneIt's overall a nice pack. They all work well in-game, and most of them look good.
Outland and Wooden walls are really great. Most of the others are okay. And some didn't turn out so well. You could maybe rework those, which are the City Wall (The pillar has undefined contours), the Iron Wall (just a bit weird), the Mithril (Really blurry and undefined) and the Rock Wall (Which lacks contours, maybe going for a more cartoonish rock).
Approved for usefulness and variety, with suggestions for improvement.