What important method was developed by Northern Reanissance artists?

Northern Renaissance artists developed the technique of oil painting, which allowed for greater realism and detail in their work. This method enabled the use of rich colors, intricate textures, and subtle gradations of light and shadow. Artists like Jan van Eyck were pioneers in this technique, leading to a significant shift in artistic expression during the period. The use of oil paints also facilitated longer working times and richer layering, enhancing the overall depth and vibrancy of the artwork.