"Shadow follows the substance",Klaus Guingand artwork.br Erwin Wurm poses for Guingand so that he immortalizes his shadow at Vienna in Austriabr Erwin Wurm answers the question." For you, what is a shadow? "br br Shadow follows the substancebr About:br 20 Famous contemporary artists pose for Klaus Guingand,so that he immortalizes their shadowbr Each shadow is painted on a canvas 79 X 60 in (200x150 cm)br Each artist signs the painting with Klaus Guingand.br Each artist answers the same question.br Each meeting is filmed.