Ramanand Sagar's grandson Shiv Sagar has revealed that a documentary is in production which will show how Ramanand made his TV series 'Ramayan' without the green screen and visual effects. "My grandfather had to work with relatively rudimentary technology," he said. This comes after people questioned the overuse of VFX in the trailer of Ranbir Kapoor and Yash-starrer 'Ramayana'.