Watch Picasso Make a Masterpiece || Short Film

'Le Mystère Picasso' is a remarkable documentary film made by French director, Henri-Georges Clouzot, in which stop-action and time-lapse photography are used to capture Picasso at work.

Not many of the works he created for the documentary survive – but three hang in the Royal Academy exhibition, 'Picasso and Paper'.

Here's how one of them came to be.