There’s a great expressionist painting from 1912 by the German Erich Heckel called ‘Two Men At A Table’. While the painting has nothing to do with the events of the novel, it does capture the claustrophobia of delusion that’s the theme of the novel.
Everything is in disorientation. The city is hot and stinking even at night. Every room is cramped and workmen clean blood stains from the floor.