Ron Mueck, former model maker and puppeteer (he was behind Ludo in the 1986 film Labyrinth), has been creating fine art sculptures since 1996. He sculpts in clay, then makes a plaster mould which he fills with a mixture of silicone, fibreglass and resin. Although all of his sculptures are hyper-realistic, he plays with scale quite a lot, sometimes making a giant face or shrinking an elderly couple. He uses horse hair on some of his larger scale work. His sculptures look so hypr realistic becuase he pays such fine attention to detail; his sculptures can even have a sheen of sweat and they all have a slightly translucent quality - probably due to the silicone. I imagine that when you work on such a large scale you also become more aware of the details as everything is more noticeable, so you have to pay attention to every dent or stubble hair. Its the kind of attention that should be shown to every sculpt, no matter what size.