Hong Kong film makers are preparing to leave filmgoers goggle-eyed by releasing the world’s first pornographic movie in 3D, a news report said on Sunday.

Shooting on the Chinese-language film 3D Sex And Zen, budgeted at 4 million US dollars, is scheduled for April with producers promising some of the most realistic close-up sex scenes ever.

“Just imagine that you’ll be watching it as if you were sitting beside the bed,” Stephen Shiu Jr told the Sunday Morning Post.

“There will be many close-ups. It will look as if the actresses are only a few centimeters from the audience.”

Twenty-five to thirty per cent of the movie, an update of one of Hong Kong’s best known erotic films Sex And Zen, will be sex scenes, Shiu told the newspaper.

A Hong Kong-based special effects company that has worked on major blockbusters including The Nightmare Before Christmas 3D will help produce the 3D images for the sex movie.

The producers hope the movie will cash in on the craze for 3D films in Hong Kong where fifty-five per cent of takings for last year’s hit film Journey to the Centre of the Earth came from the 3D version.

However Shiu admitted casting for the film was proving difficult.

“We’re having trouble finding a male lead who is willing to undress in front of the camera,” he told the Post.

“It’s a lot more difficult to find an actor than an actress for this kind of film,” he said.