Complex sentence: V. Srinivas Mohan became the film's visual effects supervisor in December 2007 after being impressed with the film's script and also asked Shankar to increase the filming schedules to include an additional six months of pre-production.
Split into simpler sentences: V. Srinivas Mohan became the film's visual effects supervisor in December 2007 after being impressed with the film's script. He asked Shankar to increase the filming schedules to include an additional six months of pre-production.