She first edited
Vidhu Vinod Chopra's diploma film,
Murder at Monkey Hill (1976), for which she also received an Associate Director credit. The film subsequently won the National Film Award for the Best Experimental Film in 1977–78. Once out of the FTII, Renu made her debut with classmate
Saeed Akhtar Mirza's
Albert Pinto Ko Gussa Kyon Ata Hai (1980), followed by
Vidhu Vinod Chopra's
Sazaye Maut (1981), then another classmate
Kundan Shah's comedy,
Jaane Bhi Do Yaaro (1983), where her work received critical acclaim. Her early work was in
parallel cinema with her FTII colleagues,
Vidhu Vinod Chopra,
Saeed Mirza,
Kundan Shah, and
Ashok Ahuja. The first offer that Renu got from outside the circle of FTII filmmakers was
Govind Nihalani's
Ardh Satya, filmed in 1983. After this her career took off, including a stint with
Doordarshan. Chopra's
Parinda was among the first mainstream films that Renu edited, and she also assisted direction. Unlike the smaller films which were made in one schedule, with the entire film completed before she started editing,
Parinda was a more complex production shot over a period of three years. In the 1990s Renu was involved in both mainstream cinema and the new crop of independent films that appeared following the success of
Hyderabad Blues. Some of the well-known films edited by Renu include
Jaane Bhi Do Yaaron (1983),
Kabhi Haan Kabhi Naa (1993),
Bandit Queen (1995),
Jaya Ganga (1996),
Pardes (1997),
Rockford (1999) and
Hey Ram (2000).
Nagesh Kukunoor's
Bollywood Calling and finally
Calcutta Mail released in 2003 was her last edited film. ==Personal life==