Here is a fairly basic US style flat lands map (4X)
Fixed Grain Mill points
Added river (means a new save game if you want to use it as fields have changed)
Added brewery
Added additional products (I have done a lot of testing so all should work, Sugar Mill, Bakery and Brewery)
Paintable grass is quite tricky, so have made all the other land Mowable meadow, which will also cycle through various growth stages, so continuously re-grows.
200 Fields of varying sizes.