I personally don't know anything about the way games are made whatsoever. Isn't this game is already using unreal 4 as the engine? Sorry if I said something stupid > < don't know anything about these stuff
I don't know how well unreal integrates with external libraries, especially one with its own graphics pipelines.
I guess U4 has its own map handling and graphics pipelines.
It's worth a look into though. Would be beautiful to be running around ground level finding resources, then call a flying taxi which transports you to a new part of the world seamlessly.
Outerra looks cool. Everybody love seamless ground to space transitions, its a real crowd-pleaser.
Unfortunately, Outerra is its own engine. It would be impossible to merge two 3D engines together, so we can't use this with Unreal. We also don't plan for outer space or seamless worlds. This is to keep the focus of design to one planet, and also to reduce the need for complex servers for seamless worlds. In order to survive on an Indie budget, our servers have to be as simple as possible and not consume much CPU or bandwidth.
But ty for the suggestion, it was fun to check their stuff out.