Furniture is usually depicted as a few straight lines, seen from the side without perspective. The people are little better. Xerox hanging on a wall. That's about it. I suppose this could change.
Some artists evolve over time.
G.B. Trudeau's Doonesbury , for example, evolved from crudely drawn characters on blank backgrounds to a strip that uses a wide palette of techniques. Trudeau understands shadow, silhouettes, perspective, transitions, and emphasis. Even so, his artistic range was increasing. As an experiment, I compared strips from two different years of User Friendly . I'm not going to hold my breath waiting for improvement.