|Cataract 3, 1967, emulsion on canvas, 222 x 223 cm, British Council, London|
Painstakingly applied emulsion in a strict mathematical pattern gives the optical illusion of movement and depth. The work, impossible to see for what it is ('merely' paint on canvas), tricks the brain into seeing its waves and colours as regressions, an alive surface.
'Representation' itself is called into question. Our eyes cannot be trusted.