From Ancient Egyptian times until the present day, plants have been illustrated. The botanical illustrator can render the plant in far more detail than is possible with a photograph. It can be done in many media but watercolor is the most popular because of its transparency. Botanical Illustrators strive to create an accurate and aesthetically pleasing representation of a plant. They need knowledge of basic perspective, a good grasp of color theory, composition and a comprehensive knowledge of botany. Three dimensional form is depicted by utilizing the elements of light and depth to create the composition. Botanical illustration is a challenging liaison between the disciplines of science and art.