Photoshop Mask Example Explanation

Mask, channel, layer mix, is the PS learning three in a stumbling block. I think, the reason why beginners find it difficult, the key is that a lot of people in the story of their application, the simple problem to make complicated. Like a mask, it was a very simple question, But I find that there are so many people who don't understand. And the online tutorial on the mask is very poor. Occasionally see, but also mostly vague, but the mask made more mysterious difficult to understand. In this regard, take time to make this tutorial, hoping to understand the role of the Mask for beginners.

Due to the production of a hurry, not carefully selected colors, you can put the background layer of the new layer from the fill black to fill the green and blue purple, such as black and white gray, and other colors, to understand the mask more useful.