I am looking algorithm for creating a isometric tiles(startcraft like), or some already prerender tiles

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:

http://www.cgocable.net/~mlepage/rts/tile.html