Why does using the Leica Authentic Look on the Xiaomi 13 Pro camera result in photos that are bright in the center and dark around the edges?

The Leica Authentic Look retains the characteristic vignetting effect produced by the original optical lenses, resulting in photos that appear bright in the center with darker edges. If a more evenly lit photo is desired, switching to the Leica Vibrant Look is recommended for a more uniform brightness across the entire image.