I know of a couple porn stars with naturally curly hair who have explicitly said (i.e. not implied or suggested) that they felt that their curly hair basically impeded their career so badly that they felt they absolutely had to straighten it. In fact not only did they feel that way, but both their agents as well as various directors told them as much. I imagine that in order to 'get away with' having curly hair, you would have to bring something else really special to the table. Like a penchant for double anal scenes, as is Audrey's case.
This is slowly becoming the bane of my porn existence, in addition to the fact that most of the cameramen in the industry couldn't do a better job of shooting porn than a chimp with a movie camera. Misty Stone is a rare example of a porn star that sticks with curly hair. Mia Austin and Julie Kay looked amazing with curly hair, they both straightened it. Cecilia Lion is a new cam model who I don't believe has done any BG: https://twitter.com/lion_cecilia She's straightened her hair at times but seems to be mostly sticking with curls. I bet if she ever does BG the chimps with movie cameras and checkbooks in this industry will get her to straighten her hair. It's wild how there's all this rage about a model with a shaved head wearing a wig but everyone seems to be okay with producers and agents forcing models to straighten their hair. I did say I support Riley Nixon keeping the skinhead look for the sake of models being able to have a unique appearance, but actually it's probably naive to think it would make a difference, so I gotta say as long as hair keeps getting force straightened in this industry I don't care if Riley Nixon has to wear a wig to get more work. Especially if it's a curly hair wig!