it with your finger, and according as you wish to see it lighter or darker hold your finger nearer to or farther from your picture, and copy that [shadow].
On the lighting of the background (562-565).
562.
OF THE BACKGROUNDS FOR PAINTED FIGURES.
The ground which surrounds the forms of any object you paint should be darker than the high lights of those figures, and lighter than their shadowed part: &c.
563.
OF THE BACKGROUND THAT THE PAINTER SHOULD ADOPT IN HIS WORKS.
Since experience shows us that all bodies are surrounded by light and shade it is necessary that you, O Painter, should so arrange that the side which is in light shall terminate against a dark body and likewise that the shadow side shall terminate against a light body. And by [following] this rule you will add greatly to the relief of your figures.
564.
A most important part of painting consists in the backgrounds of