How to use PS deceitful Act

Now see a lot of pictures to users with PS how deceitful Act, I think this function is very interesting ah, so I also learn to do, the following is the specific process hope to a great help.

Let's take a look at the production process first. Look at the original picture.

Using PS, you can easily change a face to another face, but there is a prerequisite, the two faces must be close, so as to achieve the perfect effect.
Open the two footage, select the face you want to change, and drag it to another picture.

For ease of observation
Adjust the opacity of a dragged layer
The two images of the characters and the shape of the head is good

Restore layer opacity to 100%
Add a layer Mask
Set the foreground color to black
Select Brush Tool
Adjust the brush hardness to around 20%
Smear it where it's not needed

Click on the face in the layer
Use Ctrl+m, ctrl+l to adjust brightness
To bring the brightness of the face of two pictures closer