Titain has painted on a canvas with a pattern…

Saint John the Evangelist on Patmos

It looks as if the canvas has a herringbone twill pattern. After analysing I found that the draft of the warp is an M W design. Much used in varieties in the canvases I have looked at until now. This textile is woven as a straight draft in the weft.

weave draft of the pattern of the canvas

Titian has painted Venus and Adonis on a canvas with a pattern

It has a very similar pattern as the canvas described above , find more details on https://labo.pt/titian-saint-john-the-evangelist-at-patmos