We actually have the "bones" of "unlimited" terrain with the Terrain Generator produced .mvt
"Height Outside Map: Elevation value to use outside seed map. Mathematically, the map is infinite
, even though server has finite bounds to world. "
When you import the .mvt produced by the Terrain Generator into the World Editor, save the world and open the .mvw world in Multiverse Terrain Editor Preview
it converts the fractal terrain into heightmap(s) and the terrain is then limited in size. It still seems big to me but it "cuts off" your terrain at a limit, I had props hanging out in thin air
When I first played with Multiverse I created a terrain in the Terrain Generator, imported the terrain into the World Editor, placed props in a straight line pretty far out and saved
the world back in to the World Editor, reduced camera speed in the World Editor to what seemed like a reasonable walk speed and timed a walk from the first prop I placed to the last.
It took 35 minutes
in one direction.
Now the Terrain Generator IMHO is a pita to work with and the fractal terrain isn't the best looking but the tech basis for rather extensive terrain seems to already be there.