Weekend links 837

🫧 Open on Bubbles Tree Shadows on the Park Wall, Roundhay, Leeds (1872) by John Atkinson Grimshaw. • “In many cases, the rules of physics that apply in a real scene appear to be optional in a painting; they can be obeyed or ignored at the discretion of the artist to enhance the painting’s intended effect.” An extract from The Visual World of Shadows by Roberto Casati and Patrick Cavanagh , in which the authors examine some of the rule-breaking that takes place when artists are dealing with shadows in painti