1. What is a vector?
The art of course knows what a vector is, and programmers don't understand it. In fact, the vector is the scaling, it will not distort things. including vectors, paths, and so on.
2. What is a mask?
I haven't figured it out yet, wait till I know it, and write again.
3. What is a vector mask?
A vector mask is a mask that is generated from a path drawn by the pen tool or from a vector drawing drawn by the shape tool. Only a concrete look at an example will know.
4. Specific examples
There is such a picture of a horse, we want to make a love of the status quo to buckle, remove the other things can use the vector mask.
On the horse's layer, create a custom love status, and note that you want to set it as a path. Of course, the path drawn through the pen tool is also possible, as long as it is a path.
Then, the key comes, select the layer in the menu-"vector mask-" The current path, you can get the following.
Because it is a path, you can zoom in and out at will without distortion. In some cases using this feature will have unexpected flexibility.
http://www.waitingfy.com/archives/1662
PhotoShop Vector Mask