Maybe it takes hours but only with a complicated terrain like mine. Your terrain as shown is much simpler and should be done relatively fast AND with curved slopes, not sharp angles. The sharp edges a big no-no for me
This is my floorplan with the terrain rooms. Green is terrain (17 rooms), brown are paths (8 rooms).
I selected a few rooms on the left and started the terrain generator. Notice that I stayed away from the borders where unselected rooms are.
Then I selected the rooms adjacent to the top AND the rooms that touch these from the previous set. Again I stayed away from the sides where other unselected rooms are. Notice that this selection is almost 300m wide. Without paths it could be 4 rooms of 300m x 300m to cover everything that is needed.
Both generated objects shown. You can see the overlap. By deleting the generated objects and generating each individual room (or ALL together) there is no longer an overlap and all parts fit seamless together.
I did this quickly just for this post, hardly hours of work
Of course I did have the separate rooms to start with. The most work was integrating the paths but without paths it is very simple. The actual generation of the terrain is the least of the work. The hardest is to get it like I want it. Every few weeks I try a different variation but so far I haven't found what I want it to be. But as you can see it's not that much work to try again, and again...
It's always good to have alternatives so I will study your method to see in which situations it might be better.
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