Thanks for the comments...

The ' rubble moat' is no where near complete, I just had to take a break from working on the map for awhile. More than a few hours and I get 'burned out'.

I struggle with the shadows for large objects all of the time, especially directional ones. I've yet to find a easily repeatable process for doing them. So it'll probably get tweaked some before I call it finished.

@Immolate - I don't see the brown tinge you are referring to, so maybe your color-blindness is playing tricks

The 'bulls-eye' pattern around the Tower are slightly elevated roads (may need to reduce the bevel some). During the siege, the grassy areas around the tower are largely used for the grazing of various animals.