Posted 20 October 1999 - 01:57 PM
I don't know if there is an algorithm? to create a tileset,
but, a complete tileset should at least be able to match every
possible edge you can come up with, like 2^n possiblities,
or 2^4=16 tiles if split up a square into 4 corners.
Here is some tileset info about square tilesets: