here is a screenshot from a small problem (for more information read in the description of this tileset)

i'm not sure, if this is possible, my script is specialized in tiles with a special size.

but i think you could add some "base-forms", when you change the code a bit

it takes a lot of time to model these tilesets

i worked on the script

(the "dots" in the screenshot are placeholder for tiles not added yet)

+ it don't use the active vertex, it uses all selected now

+ it joins all added parts to an object

+ it uses objects by it's names

- a bit slow when big meshes (but better than putting each extra)

- error when object missing or on inactive layer

i added 5 sample-parts (rest to do)

also to do:

random parts (for example for the top side)

put it into blenders ui (like addon, at the moment only script)

import funktion (only when not too slow)

complete tileset (for testing)

good as collectables in 3d-platformer games