This is coming along great. The neon green is maybe just a bad seasonal algae bloom. I noticed that your city wall layer looks to be below the buildings in town and they thus appear to be taller than the wall where the two meet. Southern tower of the eastern gate, I'm looking at you!

I think you could even add a fine stroke to the walls to make them stand out a bit more. I'm really digging the crumbled gate out back of the abbey. Very cool.

cheers,
Meshon