Basically, in this tutorial I’m going to be showing you how to add texture to the skin like the one in the below image.

Firstly, start by finding a stock photo that you can add the texture to. For example, you can use this one or you can of course, go to Google Images and look up some picture you are interesting in. Also you need to find some appropriate stone texture. You can do it in the same way or feel free to use mine. Ok, now open up both of your photos in Photoshop, you can either keep it at it’s current size of resize it down a little bit if you want. After that bring the texture picture to the canvas with the man’s face:
LINK:
http://www.photoshopstar.com/effects/adding-texture-to-the-skin/