If you are convinced that the image was created in a studio of a medieval forger, take some time and conduct a simple experiment:

• open the photo of the Veil in graphics software,

• remove the green and blue elements from the image,

• enhance the red element,

• read the description of the Passion in The Four Gospels.

The image processing in graphics software

Then they spat in His face and beat Him with their fists; and others slapped Him...
Matthew 26,67

When He had said this, one of the officers standing nearby struck Jesus, saying, "Is that the way You answer the high priest?"
John 18,19-23

And after twisting together a crown of thorns, they put it on His head, and a reed in His right hand; and they knelt down before Him and mocked Him, saying, "Hail, King of the Jews!" They spat on Him, and took the reed and began to beat Him on the head.
Matthew 27,28-30

The image processed in graphics software