陰影的方向有無數可能，但是一般都要貼子斷麵切線上，就是假設把物體切開以後留下的邊線。

來源: 漢至於 2017-02-09 23:42:35 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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