It is helpful to have a pen tablet for adding highlights but this will work with a regular mouse too. We’ll create highlights by painting a thin white line.

Start by painting a line through the shape of the arm.


Here’s what our image looks like after adding some highlights":

Select the burn tool and set the brush to a big and soft edged brush. Change the range in the option bar to highlights then paint the edges of the arms to make it darker.

Now change the range to midtones and paint some shadows.

Now change the range to shadows and burn the areas that you feel needs to be darker to add depth.
