Gerald Shepherd is a multidisciplinary artist who works in many mediums including painting, sculpture, photography, and digital art. He coined the terms "Ionist Art" and "Meditative Process Art" to describe his innovative sequential and developmental approaches to image making that often employ mathematics and science. In the late 20th century, Shepherd began a series of landscape and portrait paintings that combine observation with his sequential techniques to present layered ideas about the subject. He has also organized exhibitions focusing on animal welfare and wildlife conservation.