Until a few decades ago, illustrators most often plied their trade with pencil and paper, ink, watercolors, or maybe airbrushed paints. While some still work in these media, most now rely heavily on computers, at least for the finished product. Some artists, like New Jersey-based illustrator Frank Ippolito, made the switch early on. “The promise was already there, so I was one of those early adopters who jumped in with both feet,” he says. For others, going digital became a necessity when clients started changing their expectations, says Lynette Cook, who previously worked as an artist and photographer at the Morrison Planetarium at the California Academy of Sciences in San Francisco.