Even if it does impact performance, why don't you simply let the player decide wether he want better performance or more tiles? Also,
what my screen look like, with 17 tiles in height. Still got some more room.
Because it would impact performance for everyone regardless of selected terrain window size. I didn't think anyone would want to resize it just vertically.
Also, why does you lateralbar take up so much space?
What bar is that? Game window horizontal size is equal to (SIZE*2+1+55) * 16, where SIZE can be from 12 to 17. It's defined by the size of the font/tiles and design of message windows on the right hand size of the the game window, plus the size of the terrain window.
