Adjustment layers act like real layers allowing one to adjust the strength through opacity or even apply a mask to the adjustment.
调整图层如同一个真实的图层一样允许你调整它的透明度，甚至你还可以为它做一个蒙版。
With the selection from the material ID still active, select the "create New mask" icon at the bottom of the layers palette. This will apply a mask to the group just created.
通过材质ID图层建立某一选区，点击同样位于图层面板下方的“创建蒙版”，对新组创建蒙版。
Or, apply it as a mask, and let it sit 15-20 minutes before washing it off.
也可将蜂蜜作为面膜使用：脸部涂上蜂蜜，15到20分钟后洗去。
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