OK, much smoother now that I've got the re-ranking step done. It dies on the seam finding step at random, so there's something wrong there. I'll be saving the generated tiles and simply load them in future, but it still would be nice to not have to run the generator several times to get a tile set out of it.

Click image for larger version. 

Name:	g382385.png 
Views:	162 
Size:	95.2 KB 
ID:	43872