I could not call it paining, I make it just for exercise of my observation skills or play with my own photography. I open photo in photoshop, make it very contrast and draw scribbles with the mouse over the light or over the dark areas. When I have done this, I use filters and distort the scribble so I transform and sculpt the head so it looks like I want it. In this one I also added some more scribbles at the places I wanted more light. Here I have written similar process explanation, where I made same thing, but with spots instead of scribble: @brutalisti/how-to-make-sham-art