Admiring the fallen snow in Japan is nothing new, but the way it falls in Demon Slayer is something to admire. The snow is depicted in a way that makes it look like some snow falls closer to the camera and translucent, which shows more physical depth in the overall scene. In the opening to episode one, when Tanjirou carries his sister through the mountains, and this is one of the places when this happens. With the snow seeming to fall closer between you and the characters, you can almost feel the chill in the mountains. Check the clip below to see parts of this effect we're referencing.

The mountain where aspiring Demon Slayers take their Final Selection is crawling with low-level demons. These demons are intentionally contained by groves of wisteria, which they cannot bring themselves to pass. The wisteria hangs still, and its bright hue seems to light the area where Final Selection applicants gather. Even though horror and death await many of the applicants, the purple wisteria's luminosity appears to invite a stillness to the time spent waiting for it to begin.

The falling snow and the wisteria were delightful surprises that were not present in the manga. The last moment we are going to take the time to appreciate here is right from the mangaka (author), and that is the water breathing technique. When the water breathing technique is used, sword strike is accompanied by waves that are entirely out of the art animation style up until that point. The water breathing technique lays right over the top of the scene in bright flashes.