What did masaccio help pioneer?

Masaccio was a pioneering figure in the early Renaissance, known for his groundbreaking use of perspective and naturalism in painting. He helped develop linear perspective, allowing for a more realistic depiction of spatial depth. His work, particularly in the frescoes of the Brancacci Chapel, showcased a greater understanding of human anatomy and emotional expression, influencing generations of artists. Through his innovative techniques, Masaccio laid the foundation for the transition from medieval to Renaissance art.