gri·saille /grɪˈzaɪ, ˈze(ə)l/
  純以灰色的裝飾畫法
  Gri·saille n.
  1. Fine Arts Decorative painting in gray monochrome; -- used in English especially for painted glass.
  2. A kind of French fancy dress goods.
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  grisaille
       n : chiaroscuro painting or stained glass etc., in shades of
           gray imitating the effect of relief