All painters must grapple with the technical nature of paint itself and its manipulation. Choice of type of paint, canvas, application, &c. is paramount. Rothko’s work, for instance, is only effective because he found a novel way to apply paint that lends his paintings a remarkable, nigh eerie depth of color. Spending roughly half an hour just staring at the Seagram murals in the “Rothko Room” at the Tate Modern is one of my all-time favorite experiences.