Removed sand fringing.
The sand fringing that appeared in-game was set as a solid tile, because half of it was comprised of water. It did not make sense to allow the player to walk over a transitional object. The downside to that decision was that only a third of all tiles were then walkable. To correct this issue, I removed the sand fringing and replaced it with more grass. I also removed the diagonal fringes, as they are no longer needed. All grass spaces should now be walkable.