Chambers happened to see an advertisement for a casting call and rushed to the audition, only to find it was for a porno film. She was about to leave when the Mitchell brothers noticed her resemblance to Cybill Shepherd, agreed a wholesome blonde actress was needed for the film, and stopped her. Chambers, who was initially ambivalent about starring in Behind the Green Door, asked Artie and Jim Mitchell brothers for a $25,000 salary and a percentage of the gross, never expecting they'd agree. After filming concluded, she informed them that she was "the Ivory Snow Girl"; the Mitchells capitalized on this by billing her as the "99 and 44/100% pure" girl. Procter & Gamble quickly dropped her after discovering her double life as an adult film actress.

In the film, Chambers had sex with the well-endowed African-American actor Johnny Keyes. She also fainted at the end of one scene lasting over 45 minutes. The porno industry and viewing public were shocked by the then-taboo spectacle of a white woman having sex with a black man. (Chambers' parents refused to talk to her for several years after the film's release, but eventually reconciled with her). In subsequent porno films with John Holmes, who was noted for his extremely large penis, Chambers "talk[ed] dirty" to him off-camera to give him an erection, and she was supposedly one of the few actresses that could fully deepthroat John Holmes' penis. Eventually, mainstream films noticed Chambers, who in 1977, nabbed a major role in David Cronenberg's low-budget Canadian-made Rabid. However, her adult film career made Hollywood studios nervous, and hence she was unable to transition to mainstream films.

Her first marriage ended after the release of Behind the Green Door. During her 1975-1985 marriage to porn producer/director/manager Chuck Traynor, Chambers continued in both mainstream and porn films. After that marriage ended, Chambers married her third husband, truckdriver Tom Taylor. She gave birth to their daughter, McKenna Marie Taylor, in 1991, before that marriage also ended in divorce. Chambers has admitted to writer John Hubner and other interviewers that she has battled drug and alcohol addiction in the past.