[lch]

Like the others I can't offer any help or collaborative work on this, linlin, but I appreciate your efforts as well. Personally, I'd say that you shouldn't use pure red borders, they look ugly as they break up the graphics too much. The slightly differently toned borders that you use for underwater provinces are way better to the eye. I heard that the game does use some edge detection for pure red borders to automatically assign neighborship information, too, like it could be seen with early Dom1 maps already, but that algorithm is very inefficient and flawed anyway, so before you release the map you're better off with assigning the neighbors by hand in any case.