Do you know what the last sentence of Joseph Mallord William Turner – incontrovertibly the greatest British painter of all time – was? “The sun is God.” The last words of a real genius! They sum up not only his beliefs, but also his notion of art. People call him the “painter of light”. They could just as well call him the “painter of the sea”. Perhaps they should go for “the painter of the sea AND WHOA DO YOU SEE THAT LIGHT?!” From February 24 to May 24, the J. Paul Getty Museum in Los Angeles is hosting one of the biggest Turner exhibitions that has ever been, focusing…