Which Flemish painter perfected the technique of oil painting?

The Flemish painter who perfected the technique of oil painting is Jan van Eyck. He is often credited with advancing the medium in the early 15th century, allowing for greater detail, vibrant colors, and a more realistic depiction of light and texture. His works, such as the "Arnolfini Portrait," showcase the innovative use of oil paints, which became a hallmark of Northern Renaissance art. Van Eyck's techniques laid the groundwork for future generations of artists in Europe.