Adding onto Buffy..
This has happened to me before in the past, however the reason was I had downloaded the map (the files were incorrect) and causing the terrains to mix up and allowing the Map Maker to become black and yellow lines as the default ground. What I did was re-install Feral Heart, but I suggest you take the textures from Buffy when she PMs you - you'll loose your progress, obviously, if you delete Feral Heart and install again.