Wow! Is this really your first?
It's a bit square, something that i think is very common in CD3 maps, and you have that non-standard-bottom-right lighting that I'm not comfortable with... That's just my hangups, not critical things.
Great map, this makes me want to buy CD3 right now.
-Is there some reason most walls comes out square, is something preventing more organic shaped walls?
-Can you make other types of walls? I'm thinking about glacis walls, earthworks, trenches and such...