What are the primary stylistic achievements of 15th-century Italian artists. How do there traits reflect a change in mans view of spirituality and the emergence of Humanism?

The primary stylistic achievements of 15th-century Italian artists include the development of linear perspective, naturalism, and the use of light and shadow (chiaroscuro). These traits reflect a shift in man's view of spirituality as artists began to depict the human figure with more realism and emotion, emphasizing the individual's unique qualities. This emergence of Humanism in art focused on the importance of human experience and the potential for human achievement, moving away from the purely religious themes of the Middle Ages.