This example is very interesting because it is related to digital art, I am going to teach you to make a cracked head. It is very easy to learn so follow now.
Capture Picture: Take two type of image as I have taken here.
Past cracked picture: Now make copy of the cracked picture and take a new layer then paste.
Press Ctr + T key and decrease size of the cracked picture as I have done here.
Layer settings: Make layer settings as given below.
You will get it.
Eraser tool: Choose Eraser tool (E key) and make settings.
Now move eraser tool on the cracked picture until this picture.
Recommend the tutorial