Even if you just edit the RTP to have rounded edge tiles, that would be okay.
I'll be trying to make my own in the meanwhile, in case nobody answers this.
So, to summarize:
A set of world map tiles that has:
-Diagonal sections of land.
-Bridges that actually look okay when spanning more than one square of land.
The third part is optional.
Edited by lemonlure, 26 March 2012 - 01:36 PM.