Bridget Riley (after) ( 1931 - 1984 ) was a British painter. Bridget Riley (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 240 USD for Poster for Bridget Riley: Works 1959-1978 in 2006 to 1151.78 USD for New Day in 2011 , based on the size and medium of the artwork.