Yoshitomo Nara at Hayward Gallery, Emily Kam Kngwarray at Tate Modern, Jenny Saville at the National Portrait Gallery, and the Summer Exhibition at the Royal Academy of Arts.

It’s never just one thing. It’s the way a candy wrapper folds, or how the lighting in a 90s commercial hits someone’s face.

Whether they work with the latest digital programs or cut up old magazines with scissors, artists can turn collage into a ...