Hi, I am the co-maintainer of WorldEngine and I am currently working on exporting worlds generated by my tool to TMX, so that they can be edited with Tiled.
WorldEngine is an open-source world generator which simulates plate-tectonics movements and collisions, rainfall, erosion and many other physical phenomenons to automatically generate worlds which realistic and which looks great.
WorldEngine has been used in a couple of games and we are about to release a new version with plenty of features. Among them I am working on exporting to tmx.
This is something you can generated with WorldEngine:
Now, importing maps in Tiled we are working on representing the land and the ocean and starting to draw mountains and forests. As you can see we have still to find good tiles
However with one click we can easily generate large, good looking worlds of 1500x1500 tiles (until 6000x4500 should take just a few minutes).
We are of course looking for feedback and perhaps help with the tiles
Is that something you could find interesting?
Thanks for your attention!