Well, I don’t “intend” to really, and your query is instructive in that respect 
My training is almost exclusively in C+±-well, MOST of my training, I’m an old man was in psychology . . . I’m a retired prof, but with respect to game development–so I’m a complete novice when it comes to art production and my question is from that completely naive standpoint: how big can one make a “realistic” landscape in a UE4 engine created game?
Minecraft worlds are obviously ridiculously huge, but that is gained by virtue of the graphics being very unpolished and low-poly, as well as the planet generation being completely algorithm based, not hand drawn as most “realistic” landforms would presumably be.
So it sounds like 500km x 500km IS in fact “out of scope” for hand crafting “realistic” landscapes in UE4 (if not also out of scope in terms of what the game itself could handle?)?
What would you say is the maximum size that a one-man show could/should aspire to create, given they have a year or more to craft it?