Actor Nagesh was partially interested in portraying the thieving grandmother role, and felt he would have taken it to a different level according to Kamal Hassan.
For the climax scene shot at Mohan studios, it was an engineer who erected the set along with the art director, as it had to be a rocking set, they made a metal platform as the base and raised the wooden set on top of it, doing precise weight balancing. They disassembled the set and took it to Conoor, where they shot the exterior scenes at Dolphin's nose, to match the interior scenes.
According to the production manager Subbu Panchu "In those days, people used to get call sheets of actors in piecemeal basis. But for this film, we committed artistes by getting bulk dates for them. They shot the scenes involving one set of actors in one stretch. Only after shooting the individual segments they went for the climax. The entire movie was shot in 75-80 days"
The Climax scenes alone took 22 days to shoot. The production team had about a month's dates from the artists, just for the climax alone.
Without any Visual effects nor blue or green matte, the movie was done the old school way using Mitchell Camera. Kamal Hassan had to visualise the character opposite to him and perform accordingly. As there was only a dummy next to him.