>>96164827
Carnevale is pretty good for dense 3D urban terrain. This is about the minimum viable, but it can get way thicker. The only real caveat is that it needs to have a canal running through the board and the buildings should be arranged such that short ones are next to medium ones are next to tall ones so the slower units can climb them one "step" at a time. It's playable even if your section of Venice looks a bit Kowloonish.