stipple

The artist used a fine stipple to create soft shadows on the portrait.

用法提示：此处 stipple 是名词，指用细点表现阴影的手法。

You can see the stipple on the coin's surface if you look closely.

用法提示：stipple 这里指通过小点形成的表面纹理或痕迹。

The illustration shows both smooth areas and a dense stipple for darker tones.

用法提示：stipple 作为名词，表示画作中用来表现明暗的小点组合。