[antiquark]

This background blur becomes a necessity if the filmmakers are using the "LED wall virtual set" technology. Otherwise, you could see the individual LEDs if the background was in sharp focus.

E.G.: "Why 'The Mandalorian' Uses Virtual Sets"

https://www.youtube.com/watch?v=Ufp8weYYDE8

[vmladenov]

This is why the scene in Mando that’s clearly just some random hill outside LA still looks so much better than anything else in the show. Andor has some great scenes that are shot on location in Scotland.