His queer films, The Pink Mirror, Yours Emotionally, 68 Pages, Purple Skies, Breaking Free & Evening Shadows have been considered groundbreaking because of their realistic and sympathetic portrayal of the largely closeted Indian gay community.
Thereafter he apprenticed with Indian directors like Sai Paranjpye on the film Papeeha and TV serial Hum Panchi Ek Chal Ke and Dev Benegal on his feature English, August.
This film, which is a sensitive portrayal of the marginalised community of Indian transsexuals, has become part of libraries and academic course work in US universities.
His first feature Yeh Hai Chakkad Bakkad Bumbe Bo (The Sensational Six) is produced by the Children's Film Society of India CFSI.
The film is written by playwright and screenwriter Vijay Tendulkar based on a story by writer and MP Shakuntala Paranjpye.
Rangayan's next film Yours Emotionally, a co-production with a UK production company Wise Thoughts portrayed the angst of a gay British Asian falling in love with a bisexual Indian man in a small town.
His next film 68 Pages about stigma and discrimination faced by HIV positive people has been funded by DFID, UK and co-produced by his company Solaris Pictures along with The Humsafar Trust.
The National AIDS Control Organisation (NACO) has made the film mandatory for all counselor training programmes throughout India as part of their NACP III program.
Evening Shadows is a story about a gay son coming out to his mother in a small town in South India and how his family reacts to it.