Like Stage Light, it computes in real time and focuses on shape and light. Stage Light Mono is great for street portraits, serious expressions, and anything you want to give an old-world classic feel.

In this particular oil on board from 1940, we see the artist in partial profile, his head emerging from a smoky background. The face is sensitive, the gaze almost plaintive.

When the National Portrait Gallery opened its doors to the public in London on June 22, it was the first time in three years it has done so.