If we only look at the surface of the painting, there are no bright lines that are completely similar to Botticelli, we can only see subtle tones. It was not until recent years that this mysterious genius technology became clear for the first time with the help of advanced X-ray photography technology. Leonardo da vinci is a very fine pen, made of gray squirrel hair, dyed with solvent-diluted pigment, and repeatedly used Graetz paintings to show color changes. Finally, he smudged the outline with his fingers and polished it. Da Vinci's finger prints can be seen vaguely on the X-ray photos.
And the drawing method of the background is also unexpected. From the point of view of the model, the painted rock mountain scenery looks like looking down from a height, generally ignoring the linear perspective. The background image is a synthetic landscape observed from various viewpoints, and the lakes on both sides of the characters are the best example of adding surreal scenes to the real picture. Leonardo da Vinci expressed the change of color through blooming and set off the sense of distance through perspective. The mysterious breath of the famous painting Mona Lisa can be said to be the result of the genius's mastery of mysterious skills.