Thanks!
I was planning on terrains export as it also transpires to Tiled export format, but generating all the transitions would be too much. My idea was to export multilayer tileset, as it looks much simpler.
Unfortunately, I did not have time to work on the project lately. I even can not bring myself up to create a somewhat detailed video tutorial on how to TilePipe2 is supposed to be used. As soon as my life stabilizes a bit, I will return to it all.