Answer:
Humanism revolutionize the thought, and the Perspective revolutionizes the art.
Explanation:
Humanism is a philosophy that advocates in human's favor. In other words, it's precepts to express the desire to see humans occupying the central position in every aspect of the world. It's an attempt to give credibility, strength and importance to human actions. It's the opposite of Theocentricism which puts a Might Divinity in the center, as the most important one. In the case of the Renaissance, Humanism was a key factor because, for the first time, art was portraying humans as humans. The idea to create a better sight of a human body, following the mathematical rules and the correct proportions are given to the artists the desire to promote and spread a human spirit. And the Perspective, developed during the 15th century by Leonardo da Vinci and Filippo Brunelleschi (alongside several other artists), this theory uses the human tendency to look to a central point, and with that, feel the deep on the canvas. Mathematically speaking, the perspective is created by a group of parallel lines that intercept themselves in a central point (called a vanishing point). When we look at these lines and points, we have sure that the painting is tridimensional.
