Filming a category III sex movie in 3-D could be more than an effort to titillate jaded audiences - it might also add a new dimension to Hong Kong's tourism industry.
This is the possibility held out by producers of 3-D Sex and Zen: Extreme Ecstasy - perhaps the world's first three-dimensional soft-core porn movie - who say several travel agents are hoping to include private screenings as part of their tour itineraries for mainlanders.
The city's relaxed rules on entertainment and publishing are already an attraction for visitors from the heavily censored mainland; adding 3-D gives it another facet.
The HK$25 million period drama will not make it to mainland cinemas because of its sexual content. But the movie - based on Sex and Zen, which took more than HK$18 million at the box office in 1991 and was the highest-grossing category III movie in Hong Kong - is already a talking point over the border.
Mainlanders are also thought to have played a large part in the box-office success in Hong Kong of the uncensored version of Ang Lee's sexually explicit Lust, Caution, which earned more than HK$48 million in 2007.
The Venice Golden Lion-winning film was also shown on the mainland but with the sex scenes edited out.
