Go deep into Freud, follow Gwen John home and watch Giacometti melt – the week in art

The master portraitist’s process is spelled out, Cardiff celebrates the great Gwen, Lynda Benglis eyes up Giacometti and Scottish art schools wind back the clock – all in your weekly dispatch Lucian Freud: Drawing Into Painting Dig deep into the vision of this great artist with an exhibition that follows his portrait process from paper to canvas. • National Portrait Gallery, London, from 12 February to 4 May