Cinematographer Rajiv Menon has given the most detailed account yet of how the promotional video for KHxRK , the upcoming Rajinikanth-Kamal Haasan collaboration directed by Nelson Dilipkumar, was put together in just four days, and revealed that the two legends needed 20 takes before they could walk in sync on camera. In a conversation with I AM with Dhanya Varma show, Rajiv Menon said his entry into the project came through Mani Ratnam. Nelson had met the veteran filmmaker and expressed that he wanted a slightly different visual approach for the film. Mani Ratnam, who had worked with Rajiv Menon on Bombay and held him in high regard, suggested his name for the project. Rajiv Menon said he was uncertain at first about which character he was being attached to, as the film has a commissioner character and a DGB character among its principals. When Nelson sat him down and narrated the script, however, any uncertainty disappeared quickly.…