He left for London in 1959, where he worked and lived till 1964. Thereafter, he visited the New York City, when he was awarded a fellowship from the John D. Rockefeller 3rd Fund in 1968. During the years the Artist spent in London, Mehta's style was influenced by the expressionist works of Francis Bacon, but while in New York his work came to be characterised by minimalism. He made a three-minute film, Koodal (Tamil for 'meeting place'), which he shot at the Bandra slaughter house, it won the Filmfare Critics Award in 1970. He also remained an Artist-in-Residence at the Santiniketan between 1984–85, and returned to Mumbai with significant changes in his work. Common themes of his works were trussed bulls, the rickshaw puller, from here he moved to the Diagonal series, which he created through the 1970s, after accidentally discovering it in 1969, when in a moment of creative frustration he flung a black streak across his canvas. Later in life, he added Falling Figures made in 1991, based on his experience of witnessing the violent death of a man in the street during the Partition of India riots of 1947, Besides adding several mythological figures into his work, highlighted by the depictions of goddess Kali and demon Mahishasura.