First Man DID IT BEFORE The Mandalorian

First Man (2018), directed by Damien Chazelle and starring Ryan Gosling, used a huge LED volume to shoot visual effects in-camera.

Instead of filming on a green or blue screen and replacing elements digitally in post, this approach allows actors to be more present in their performances, while also bringing in beautiful lighting and reflections integration that would be very hard to achieve with traditional CGI replacement techniques.