带有人工光的夜景几乎总有暗调子的情况(即low - key直方图)，否则就会出现明显的高光反差(blown highlight)。
Night scenes which contain artificial light sources should almost always have low-key histograms, otherwise these will have significant blown highlights.
新鲜：唇线的颜色要比你的自然唇色暗一个调子。
Fresh: Use lip liner one shade darker than the natural color of your lips.
照片展示了直射阳光下的球体。它从亮部到暗部的调子泾渭分明。这个就是素描关系。
The photograph above shows a sphere in direct sunlight. It has a distinct set of tonal steps from light to shadow, known as modeling factors.
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