Due to the sense of damping, writing that is too smooth will lead to uneven strokes and uneven structure. Therefore, it looks ugly when written. For example, when writing a name on an answer sheet, some strokes will be longer or shorter. Rice paper used in calligraphy is the best example. It has a bit of smear, which makes the strokes more rounded, and has a rough surface with appropriate damping. That’s why it looks good.