 Pete Draper , who worked with <unk> in <unk> ( 2008 ) , was selected as the pipeline technical director of the film . At that time , Kamalakannan was in Iran <unk> the CG stadium and City with Adili . The majority of the film was shot in <unk> format , but a Super 35 camera gate and lens were used for the stadium episode to minimise distortion . Post @-@ production of the stadium scenes were given to Prasad <unk> , and the film set up their own render farm in Chennai . The post process was done in several stages after the scan . The live stadium had only 7 steps , in which live people were positioned in 6 steps while the remaining 12 steps were CG extension . Adili created 3D CG people to fill the CG steps and their actions in a library of 3000 frames . 
