[Alvr]

Thanks! Yes, you are right, there is much more in my head. In fact, I started the 3D model as a trial of the 2D planning. Some things are still rough, specially the terrain.

The city is not very big, as the central island has around five kilometers long per two kilometers wide. But I decided to limit it to the interior of the three islands, although there are some singuar buildings on the other bank of the river.