The process of editing movies shot on 35mm film during the post-production stage involved several steps, including assembling the raw footage, splicing the film reels, color correction, and adding sound and special effects. During the assembly stage, the editor would review the footage and decide which takes to use and in what order. This was done by physically cutting the film reels into individual shots and splicing them together in the desired sequence.
Next, the spliced film reels were then sent to a color correction lab, where the colors were adjusted to achieve the desired look. This was done by adjusting the levels of red, green, and blue light that were shone onto the film. In the sound department, dialogue, sound effects, and music were added to the film, often using magnetic tape. The sound was then synchronized with the picture by using a timecode, which allowed the editor to match the audio with the corresponding visual elements.
Special effects were added using a variety of techniques, including matte painting, miniatures, and blue/green screen compositing. During the blue/green screen compositing process, live-action elements were filmed in front of a blue or green screen, which was then replaced with a different background image in post-production.
Once all the elements of the film had been edited and combined, the final cut of the movie was made by conforming the edited film reels back onto a single master reel. This reel was then used to create the film prints that would be distributed to theaters.
In conclusion, the process of editing 35mm film involved several steps, including assembling the raw footage, splicing the film reels, color correction, and adding sound and special effects. These processes were crucial in shaping the final product and transforming raw footage into a polished and cohesive film. The use of 35mm film as a medium for capturing and editing movies has since been largely replaced by digital technologies, but the techniques and principles used in the post-production process of film remain largely unchanged.