Egg tempera, an ancient painting technique that uses the egg yolk and water as the painting medium, is experiencing a renaissance. Today many people are attracted by traditional painting methods and natural products, and egg tempera is the perfect "natural" way to paint. This technique was used by the 15th-century Italian panel painters, such as Botticelli and Fra Angelico, and by 20th-century luminaries, such as Paul Cadmus and Andrew Wyeth. Author and renowned contemporary artist Altoon Sultan loves the fast-drying technique of egg tempera that results in clear form, crisp details, and luminous layering of color.