Paul Moorhouse: We are standing in front of a full-size cartoon for Cosmos, the new wall painting that will be installed at Christchurch Art Gallery. How does the cartoon relate to the final wall painting?
Bridget Riley: The cartoon is painted in gouache on paper, but it gives me a good idea of the full-scale image that will be recreated on the wall in Christchurch. I have also made a smaller painting in acrylic directly onto the wall here in the studio. This is complete in itself, and provides the information I need to give me confidence in the appearance of the discs when the larger image is created on the gallery wall.