Its practice may have migrated westward during the Middle Ages.Oil paint eventually became the principal medium used for creating artworks as its advantages became widely known.The oil may be boiled with a resin, such as pine resin or frankincense, to create a varnish prized for its body and gloss.
Many of these monks embellished their caves with religious statuary and elaborate, brightly-colored frescoes.
monumental statues of standing buddhas carved into the side of a cliff in the Bamyan valley in the Hazarajat region of central Afghanistan, situated 230 km (143 miles) northwest of Kabul at an altitude of 2500 meters (8,202 ft).
Built in 507, the larger in 554 The main bodies were hewn directly from the sandstone cliffs, but details were modeled in mud mixed with straw, coated with stucco.
This coating, practically all of which wore away long ago, was painted to enhance the expressions of the faces, hands, and folds of the robes; the larger one was painted carmine red and the smaller one was painted multiple colors.
The lower parts of the statues' arms were constructed from the same mud-straw mix while supported on wooden armatures.
The choice of oil imparts a range of properties to the oil paint, such as the amount of yellowing or drying time.