Philosophy of art...in Italian painting during the Renaissance

The "Renaissance" is that glorious era that people agree to consider the most wonderful achievement of Italian creativity. It includes, in addition to the last quarter of the fifteenth century, the first thirty or forty years of the sixteenth century. In this narrow scope, accomplished artists flourished, such as: Leonardo da Vinci, Raphael, Miquelang, Andrea del Sarto, Giorgione, Tissian, Sebastian del Piombo... and this space with clear boundaries, its progress found an incomplete art, devoid of mastery, characterized by dryness and strictness, which is evident in the works Antonio Paola Iolo, Fra Filippo Lippi, Domenico Ghirlandagio, Jean Blin, and if you go beyond them, you find vulgar art and students who deliberately exaggerate or innovate incompetently, such as Julius Roman, Rousseau, Primatis. Before that, art grew and finally withered.
We can liken this era, which was characterized by wonderful creativity and reached the utmost perfection, to the area located at the foot of a mountain where vines are planted. In the upper part of it, the grapes are not good because the air is very cold, and in the lower part they are not good either because the soil is very moist. This is the reason and this is the Sunnah.