The woman who was allegedly raped after a LiL Wayne recording session is suing the man she claims is responsible ... music producer Noel "Detail" Fisher.
In the lawsuit -- filed today in L.A. County Superior Court and obtained by TMZ -- the alleged victim claims the horrific ordeal occurred at Detail's home in Newhall, CA on January 29 and 30.
The alleged victim claims she was a guest at Detail's house that night -- and after refusing his sexual advances -- he ripped off her clothes, locked her in a room, and then raped her.
The alleged victim claims she's suffered "irreparable physical, mental and emotional discomfort and harm" ... and is suing Detail for an undetermined amount.
As we previously reported, Lil Wayne was recording tracks at Detail's house that night ... but cops say he's not connected to the incident. It's currently under investigation.