Stephanie Valentin will show you how to draw realistic hair in Photoshop. Add a new layer of paint to shape the hair, and do it with a round brush. Create hairs all around the shape with a smudge tool. Then add a new layer and draw a line with a soft round brush and smudge tool. Repeat the last step several times drawing more hair if you want. Add a new layer and add some light with a smudge brush and a round brush. When done, adjust the layer of opacity. Again, add another layer and add light and you're done.