What happens between assembly and rough cut
The editor builds the assembly cut during the shoot, often scene by scene as dailies arrive. Once the director comes into the cutting room after wrap, the work shifts. They pick takes, tighten scenes, drop lines that repeat information, and try moving scenes around.
A 118 page script shot at close to a minute per page might assemble at 2 hours 20 minutes. A first rough cut of that film could be around two hours, with a few whole scenes lifted and most scenes trimmed at the top and tail. Those numbers vary with the director's style and the script. The pattern of running long and shrinking in stages is common.
What a rough cut looks like on screen
Expect temp music pulled from other films or libraries, sound effects cut in by the editor or assistant, production dialogue with no mix, and title cards like "VFX SHOT 42A_010 TO COME" over green screen. Color is the dailies LUT. Viewers who aren't used to watching rough cuts often react to all of that instead of the story, so it helps to tell a screening audience what is missing before the lights go down.
The notes stage
Producers and financiers usually give notes on a rough cut. Good notes describe the problem ("we lose track of why Maya goes back to the house") and let the editor and director find the fix. The rough cut also shows what was never shot. The post supervisor collects missing inserts and coverage into a list for a pickup day, which is much easier to schedule now than after picture lock.
Common mistakes
Spending money on finishing work too early is the usual one. Hiring a composer to score a rough cut, or ordering VFX on shots that may be cut, wastes budget. Start those vendors on the fine cut, when scene lengths are closer to final, or give them clear notice that timings will change.
Another is losing track of versions. Label every export with the date and version number, something like "LONGDRIVE_RC3_2026-09-14", so notes refer to the right cut. Some editors burn timecode and the version name into the picture of every screener for the same reason.