Unfortunately, my skill with photoshop is very limited, so I am not really able to do much post-processing.
The lake is actually a big river as it reaches the ocean; since the two shores are roughly 1,5km apart, showing it takes a lot of space. I planned to use part of that space for the legend of notable buildings. The scale of the full-size document I'm working on is 1px=75cm, so anything smaller than houses would hardly be visible (and completely invisible in the scaled down version). I could add boats and ships, but I am not really able to draw them.
But what do you think of the city itself? Size, street-building ratio etc? Is it "believable"?