World's first 3D porn film!

Actress Saori Hara and actor Hiro Hayana of Japan perform during filming on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong on August 13, 2010. The AV actors are being filmed for Hong Kong director Christopher Sun's film, billed as being the world's first 3D porn film.  (AFP/Ed Jones)

Saori Hara and Hiro Hayana perform on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong. (AFP/Ed Jones)

Saori Hara on the sets of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong. The director is in a race against time to complete his 3.2 million-USD film which is due for release in May. It is a race because Italian director Tinto Brass has already announced he will produce a 3D remake of his 1979 erotic film Caligula.  (AFP/Ed Jones)

Saori Hara and Hiro Hayana perform on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong.  (AFP/Ed Jones)

Actress Saori Hara and actor Hiro Hayana of Japan take instructions from director Christopher Sun as they prepare for a take on the film set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong. (AFP/Ed Jones)

Saori Hara and Hiro Hayana on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong.  (AFP)

Saori Hara on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong.  (AFP)

Director Christopher Sun wears 3D glasses as he watches a take on a preview screen during filming on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong on August 13, 2010. (AFP/Ed Jones)

Saori Hara and Hiro Hayana on the set of '3-D Sex and Zen: Extreme Ecstacy' in Hong Kong.  (AFP/Ed Jones)