A retrospective of the prolific German photorealist painter Gerhard Richter has just opened at Tate Modern. This exhibition takes you on a journey through his fascinating relationship with paint and there are some truly breathtaking paintings. His technique of painting an image that looks like an out of focus photograph by dry brushing the oil paint surface is just beautiful. None more so than his skull series of 1983, the top image is in the current exhibition and prints are available from the Tate shop.