他称，但达芬奇没有中途改变主意，之后，他在底层上添加了一层釉料阴影层来制造三维效果。“
"I do not say that he was successful, in reproducing a stereo-vision effect, but if you want to achieve that this is the best way to do it," said Cotte.
柯特说：“我并不是说他在制造三维效果上做得很成功，但如果你想达到这种效果，这是最好的办法。“
"But now it looks totally different to how he painted it. All the optical effects have disappeared."
“但现在，这幅画和最初达芬奇绘制它时已完全不同。所有的视觉效果都不见了。“
He said that for da Vinci the Mona Lisa was "more than a painting, it was a challenge to reproduce real life".
他表示，对于达芬奇来说，《蒙娜丽莎的微笑》“不仅是一幅画作，还是重塑现实生活的一个挑战。