Is there a diagonal shore line? A checker board shape of Water and Shoreline?
Viewing post in RPG Overworld Tileset comments
There's an inside and an outside corner to the shoreline, so you can create a 2 tile thick diagonal line with those. I'm not sure what you mean by checkerboard, but the tileset doesn't allow for alternating land-sea-land-sea tiles. It would be land-shore-sea-shore-land-shore-sea-shore. Hopefully that makes sense!