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According to former Clover CEO Atsushi Inaba, the series' trademark Celestial Brush mechanic was directly inspired by the ukiyo-e art style. In a 2006 interview with GameSpy, Inaba stated "Once we fixed ourselves on a graphical style and got down to the brushwork, we thought, 'Wouldn't it be great if we could somehow get the player involved and participate in this artwork instead of just watching it?'" These comments also explain why in both games, activating the Celestial Brush renders the current frame as a scroll of washi paper.