Thinking Big - Torq's landgrab - choose a territory

[Redrobes]

...running the water level up to find areas that would "pool" and be contained when rivers run into them.

I have done a demo of this in the past - this one is filling it up to a predetermined height though if set slightly differently to keep going it would overflow and cut an erosion channel and drain it out. The other prog I know can do it is GeoControl. I expect there are others tho.

On the terrain front, I will probably slightly modify the coastline. We don't have a depth below sea (bathymetry) which I will be manually making otherwise my sea will evaporate (!???) and this is likely to alter the coast slightly.