The magic, literally, behind the vast landscapes of “The Mandalorian” is a combination of huge LED screens and the same Unreal gaming engine used to build many of the most popular first-person shooters.
I assumed there was some green screen work but this video shows that they built a 360 degree LED soundstage and virtualized most of the “sets”. Simply amazing and now I have to go back and see if I can tell that it is all digital.