How can I change landscape during the game?

I’m looking for a game engine that allows to visualize data changes through landscape.
UE looks nice but I’d like to know how difficult can be what I’m going to do.

I’d like to change landscape heightmap in real time.

Is it possible to do this kind of things by code? How? Can someone show me an example?

i dont have a solution but i’m trying to figure that out too.