>>7715396
That's moreso just anime being anime. Especially in the 80s and 90s, anime had very detailed hand painted backgrounds. The art style is just fairly realistic in general, especially compared to western cartoons. Human proportions, very little exaggeration, often a calm almost slideshow-esque cinematography style, typical japanese naturalism, it just lends itself well to blending seamlessly with realism. It's gotten a bit flanderized as of late, but it still holds on to a lot of the old grounded design principles.