If you think about it, there is no better example than the snowman of how easy it is to create order from artificial signs. They are, after all, just massive snowballs accessorised to denote human characteristics. Jeff Koons’ kitsch rendering looks like a blow-up doll. His snowman carries a large blue orb in the artist’s trademark shiny metal. Koons has made snow textureless, without imperfectiona, but that goes against all we know to be true. It’s a textbook winter image – but the inscrutable snowman is somehow rather chilling.