Most people probably still remember the incredible special effects in Hollywood movies such as Jurassic Park, Independence Day and Twister.
But movie makers may sometimes employ computer technology in such a subtle way that audiences are unaware of it. The Soong Sisters from Hong Kong director Mabel Cheung Yuen-ting is one example.
The film is about the lives of the Soong sisters - Ailing, Chingling and Meiling - who played a role in shaping recent Chinese history.
Unlike science fiction, this historical story seems an unlikely candidate for advanced technology, but in fact, many computer-enhanced special effects are used in the film.
Choi Kwok-keung, digital graphics designer with Centro Digital Pictures, said the film contained 40 special effects.
The company spent more than six months working on The Soong Sisters. The 3-D animation requirements alone took three to four months to create.
