[15] This possibility is plausible, given the fact that Leonardo discussed the rudiments of stereoscopic vision in his Trattato della pittura.

This conclusion was based on the long-held belief that the copy's wooden frame was thought to be oak and due to its repainting.

However, during the 2010 restoration, conservators realized the frame's material is walnut, an expensive wood frequently used in works of Leonardo, such as Lady with an Ermine, La Belle Ferronnière or Saint John the Baptist.

[3] After the restoration, it was suggested that two of Leonardo's pupils, Francesco Melzi or Salaì, were among the probable painters,[1][5] though others questioned this assumption; they suggest the author could have been a Spanish student of Leonardo, namely Fernando Yáñez de la Almedina or Hernando de los Llanos.

[18] The painting cannot be considered as a typical workshop copy due to its careful and thorough execution, as well as its use of materials such as lapis lazuli or red lacquer.

[19] Ana Gonzáles Mozo, curator at the Prado Museum in Madrid, wrote in the catalog for the exhibition Leonardo and the Copy of the Mona Lisa that the so-called Ganay copy of the Salvador Mundi was likely done by the same artist that painted the Prado Mona Lisa.