“She made sure the room was picture perfect before the party.”
Something that is picture perfect looks exactly right. No detail is overlooked. Perhaps it’s called “picture perfect” because it looks too perfect to be real, more like something from a picture.
「パーティーの前に部屋を完璧に飾りました。」
Picture perfectとは、見た目が完璧なものです。どんなに小さなことも見落としません。たぶん、完璧すぎて実世界よりも絵の中みたいなので picture perfect と言うのでしょうね。
