Think about this phrase: "How did the sculpture look?"
If I asked you this, how would you respond? Would you tell me what it looked like? Or would you tell me how it impressed you? I think this question is asking how something looked, in the sense of it appearing like something else. Simply saying "how" something looks can be vague since if could include another kind of question that would be worded differently in Korean.
That is my interpretation, at least.