Aerostar Saguaro Cactus special shape hot-air balloon seen at the Albuquerque Balloon Fiesta. The balloon was built in 1989 to promote a land development project in Arizona and stands over 130 feet tall.
VALUE Toast gradient. Human eyes can perceive 255 distinct levels of values (shading). If someone can find toast with 15 different levels, surely you can have more than just 3 or 4 in your drawings and paintings.