Crossposting, but eh. I figured it fits better here and might be of interest. Going to be writing up stuff more properly in the PUSE dev log soon but there's already some more info there.
This is for a Unity game, so it works inside the editor which itself isn't mine of course, but this terrain thingy is my work completely.
Until like two days ago it wasn't working in real time in the editor so I had to start the game to run the algorithm and I couldn't edit the shape during gameplay. With a couple of extra lines I fixed that, and now I can modify terrain which automatically textures itself in real time even while playing the game. I've been heavily inspired by UbiArt for this.
This GIF shows the play view as I'm modifying the shape of the terrain in the offscreen editor view by modifying vertices of a polygon collider.
I think it's pretty darn cool!