But when Oscar Ukonu uses it, he creates this — a monochromatic and hyperrealistic masterpiece that can sell for up to $600 per print to his clientele in Nigeria and around the world.

12.) Omar Ortiz is a Mexican artist who paints realistic portraits. His pieces are made with oil paint. He says the hardest part is getting the skin tones right. 13.) Ruben Orozco Loza makes mini ...