Being just as curious as the next guy about the recently attributed panel picture to Leonardo, I thought I’d post images from Windsor of two red chalk preparatory drawings by Leonardo for a Salvator Mundi. Links to the Royal Collection allow for enlargement of the images.
LINK to Leonardo’s Studies of Drapery for a Salvator Mundi at Windsor
LINK to Leonardo’s A Study of Drapery for a Salvator Mundi at Windsor

Leonardo da Vinci (1452-1519) | Studies of drapery for a Salvator Mundi | c.1504-8 | Red chalk with pen and ink and white heightening on pale red prepared paper | 164 x 158 mm | Royal Collection | Windsor

Leonardo da Vinci (1452-1519) | A study of drapery for a Salvator Mundi | c.1504-8 | Red chalk with touches of white chalk and pen and ink on pale red prepared paper 22 x 139 mm | Royal Collection | Windsor
The picture below has just popped up on the internet, a good deal changed, and more believable than the pre-conservation photo.

Attr. to Leonardo | Salvator Mundi | Oil on walnut panel | 65.6 X 45.4 cm | Robert Simon et al. | NYC