Playboy's newest Playmate is not the first transgender woman to appear in the magazine. The model Caroline "Tula" Cossey was featured in the September 1991 issue.
The forthcoming issue of Playboy will be a tribute to the magazine's legendary founder Hugh Hefner, who died last month at age 91. In announcing Rau as the next issue's Playmate, the 64-year-old magazine sought to counter any criticism by comparing the choice of Rau to other controversies it has faced - perhaps even courted - in the past.
The magazine issued a series of tweets about the reaction it received after choosing its first black Playmate in 1965.
Playboy received some negative comments on social media for its choice of Playmates, but the magazine stood firm.
Ines told the magazine that coming out as transgender has been liberating experience.