Nice to see you post here, was following your progress earlier.
There’s a LOT of potential here.
For a persistent saved level, do you have a good way of saving/transmitting the modifications being made including multiplayer?
Personally I still like to have artist control with World Machine or GeoControl , at least when it comes to my mountains and certain features. I’d probably mix the methods unless there’s a way to make use of user-generated heightmaps as “stamps”, kind of like decals.
Looking forward to seeing updates! Lots of talented people here willing to answer questions, including Epic Devs, so don’t hesitate!