By the end of eighties, Radha had almost completed a decade of complete dominance in the South. But still, the tag of a good actress still evaded her and though she came up with some spirited performances in movies like Engeyo Ketta Kural, still she was labeled as a glamour doll. That was a time when actress like Archana, Revathy and Suhasini were getting national recognition for their acting and Radha too longed for some recognition of her talent. Her immense acting talent was never really tested. Yet again , the break came from her mentor Bharathiraja. When Muthal Mariyathai project was started, it was widely spoken that two giants , a giant actor and a giant director , were coming together and it was going to be a real challenge for the heroine. Many were considered and dropped. And finally Radha was chosen because of just three points:
1. Her village girl type looks
2. Her close association with Barathiraja
3. Her boldness to act without a blouse throughout the movie.
Yes, it was very ironical that she never got the role for her acting skills. Even Sivaji was hesitant to co-star Radha because at that time , Radha and Prabu were quite a hot pair. With Prabu too, Radha followed her usual technique. There was a time when Prabu was quite close to Ambika and he never starred any movie with Radha. He was quite happy with the elder sister . And in Vellai Roja , a Sivaji-Prabu starrer , Ambika was chosen as the heroine for Prabu without any second thoughts. When they were considering an actress to play Prabu’s sister, a very minor role, as usual Tamil industry regular sisters like Sumathy, Rajalakshmi were considered. Because Ambika was already in the project, Radha came to know of this minor role and she immediately approached the director. She not only bagged the role but also convinced them to give her a duet opposite Suresh. She played a very erotic seduction scene with Suresh and purposely exposed a lot In the movie, She appears wrapping her body in just a towel and she shed that too in the scene where she makes love with Suresh before getting married. It was taboo in those days for a mainstream heroine to act in such scene in those days but Radha played such scenes with aplomb. Though the original script never had a duet and the bedroom scene in the script was not as erotic as it was finally filmed, it was still a mystery how Radha convinced director Rajasekar to make changes in his script. The movie also features some glamourous songs featuring Ambika and Silk Smitha but still Radha stole the limelight with her song “Solai Poovil Aadum Thendral”.