A new 3D adult film is set to open in theaters across Hong Kong and Taiwan. Sex and Zen: Extreme Ecstasy is modeled on The Carnal Prayer Mat － a classic Chinese erotic text. The graphic film is banned in mainland China, this has prompted many to travel to Hong Kong and Taiwan to see it. This amount of fanfare over an adult theater release is rare. Many get their porn through illegal downloads nowadays. The industry is likely hoping the 3D gimmick will drum up legitimate sales. Hustler released a 3D porn spoof of Avatar last year. 3D may be fun for action films. But is the technology a little too invasive for hardcore porn?