6 introduce realistic details
Small details such as veins or beauty dots won’t be immediately apparent, but will give the last touches of texture and realism to portraits. These can also tell a story: for example, exposed veins can be useful for depicting a vampire or a person who’s ill. I generally use the same brush to create these details: a very fine brush that allows for precise work. I slightly blur the brushstrokes’ extremities, to unify and soften the details.