Who invented 'shading' in art?

Shading in art, which involves the use of light and shadow to create depth and dimension, has been utilized since ancient times, with early examples seen in Egyptian and Greco-Roman art. However, the systematic study and application of shading techniques were significantly developed during the Renaissance. Artists like Leonardo da vinci and Michelangelo played a crucial role in refining these techniques, particularly through the use of chiaroscuro, which emphasizes the contrast between light and dark. Thus, while no single person can be credited with its invention, the Renaissance marked a pivotal moment in the evolution of shading in art.