yeah true, regarding the process mudbricks are easier than wood. I was expressing it wrong. I meant that mud is in reality also dependant from the environment. As I said, Babylon could use it in large quantities, with two rivers in the area and a hot climate it offered the perfect solution for buildings. Also with burning mud/clay to ceramic it had a good point. In Egypt and Crete it was different. So they changed to wood or combined wood and mud as material.
So Rivers are a great place for the future :)
Well I can imagine that ships will take a while to implement, take your time :D