I basically hate sci-fi, but I was still fascinated by the design of lighting and shadows in this film. The high-key, high-contrast exterior of the snowy mountains acts obviously opposite to the low-key, low-contrast interior of the hotel. The lighting of the interior scenes can be described as "dazzling," not dazzling brightness, but dazzling colour and weirdness. The director seemed to deliberately avoid any establishing shots; thus, the audience would still be confused about the internal structure of the hotel until the end of the film.
There are the typical blinds of film noir, but they don't cast the classic shadow of the blinds onto the characters, despite the shadows from other frames and obstacles being abundant in this film. Also, there is a noir-style narration of the protagonist throughout the film. The narration begins in the past tense of memories, while slowly turning into the immersive present tense. After arriving at the hotel, the protagonist enters his room for the first time, and there are several typical splitting reflections of him in mirrors, which craftily foreshadow that he would be the one who will eventually encounter a dilemma, morally.
The film ends with the protagonist questioning himself against the fourth wall - should individuals within the institution and authorities carry out duties diligently, or should they hold their sympathy high for the objects?