Here’s the artist’s post about it
@dave UE4 was already achieving incredible results, but this is something else. I honestly can't tell it's not real.
@dave It's a large location, with indoor/outdoor transitions and you can't fucking tell. Even with hand-finishing that's still amazing.
@dave The night scene has a little too much back scatter off particles (that slight haze is very rare in reality) bu I can't wait to see more out of this engine.
@dave Especially after I said "We are not far from the ideal Waifu"