"If you want to replenish your visual thinking, you have to go back to nature.." DAVID HOCKNEY "Lots of people tell me that I made them look at trees again... Trees are like an individual person - all the leaves are different, all the snowflakes are different -- everything is in Nature" NGV Video As Britain’s most revered living artist, Hockney has broken new ground throughout his long and distinguished career, in painting, film and as a set designer for the leading opera h