Robert de Niro
Color pencils Faber Castell Polychromos on Fabriano 4  paper 160 gr. - 25 x 35 cm.
You can see how I was doing this drawing in a video course that I recorded  in Spanish language with Domestika:
https://www.domestika.org/es/courses/250-retrato-realista-con-lapices-de-colores/nestorcanavarro

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