grisaille

1. Grisaille: painting technique by which an image is executed entirely in shades of gray and usually modeled to produce the illusion of sculpture or relief.
   灰色单色画完全用灰色浓淡变化描绘形象，通常多突出立体感，以形成类似雕塑，特别是浮雕的视觉效果的绘画技法。
2. In the16th century grisaille enamels were developed in Limoges, France; the technique achieves a dramatic effect of light and shade and a pronounced sense of three-dimensionality.
   16世纪时，纯灰色画珐琅艺术发展于法国利摩日，此技巧在光和影上达到戏剧性的效果和明显的三维空间立体感。

noun

1. chiaroscuro painting or stained glass etc., in shades of grey imitating the effect of relief