Custom maps

1
Good day people,

I have decided to start making my own custom maps, via tests I have now a clear idea of what type of black/white represents the different altitudes. I took a map of central Europe as starting ground to work from and things are looking smoothly.
Now i don't see any maps yet on feudal tools that don't have a slab of water around the edges. So my question is what will happen if I remain true to the lay of the land and don't add water on the borders? Anyone that has any experience with that?

Kind regards,
Silvarian
cron