What's the difference between movies and digital movies in post-production of special effects?

The most fundamental feature of digital movies is that they are separated from films and stored and displayed in the form of digital files. Because digital film does not need to be copied, the distribution cost is greatly reduced, and the picture can be guaranteed to be jitter-free, flicker-free and not easy to wear by virtue of sufficient pixel stability, and can be repeatedly shown for countless times.

Film can reflect the details and atmosphere of the scene more delicately, and it is more inclusive than digital in color, light change and tone.

As long as it is shown in the cinema (except digital cinema), film must be used, that is to say, even if it is shot with a high-definition digital machine, it must be transcribed into film when it is shown, otherwise it will not be shown on the screen.