Clear Out or Add Background People, and Light the Lamps, in a Finished Clip

Quick answer: Open Edit this clip → AI visuals. Background people → Clear them out leaves only the set and the characters the shot names; Add a crowd puts ordinary passers-by in the background, out of focus and not looking at the camera. Lights → Light them up turns on every lamp, candle and lantern already in the scene. Each is one edit at 2× the per-second price of the clip’s tier for the length of the clip.

Still from “The Glass Floor”, an AI short drama generated end-to-end by SceneMixer (5 characters, 1 episode) — Sample: “The Glass Floor” — Realistic HD, 1 episode, produced end-to-end by SceneMixer from the script · watch the episodes

Classic case: a scene written as a private conversation that came out with strangers in the background. Clear them out on that one clip.

Clear them out

The background becomes empty: the furniture, walls and props stay, and the only people left are the characters your storyboard names for that shot. It works best on people who stand or walk in the background for the whole clip. Someone who walks in half-way may not be removed; for that, regenerate. It will not remove a named character or a duplicate of one — those come from the storyboard. Who is in frame.

Add a crowd

The background fills with ordinary passers-by going about their business, kept out of focus and never looking into the lens, so they read as extras rather than new characters. Use it for a market, a party, a station or a hall that came out empty. Nobody in the crowd is given lines.

Light them up

Every lamp, candle and lantern already in the scene is switched on and throws warm light on what is near it. It is made for scenes that have these objects; it is not the way to add new lamps to a room. It pairs well with Time of day → Night, which lights a scene only from its own sources: run Night first, then Light them up on the result. Day to night.

Step by step

Select the segment and open Edit this clip → AI visuals.
For a clip over 15 seconds, choose the half.
Click Background people and then Clear them out or Add a crowd; or click Lights (its only option, Light them up, is selected for you).
Press Edit into a new version.

One clip or the whole scene?

These edits change one clip. If every segment of a scene should be empty — or busy — the storyboard is the better place: each segment has a background people line, and when it is right the segments come out consistent, now and on every regeneration. Use AI visuals for the one or two clips that came out differently. Background people in a scene.

Option	Result	Not for
Clear them out	Only the set and the named characters	People who walk in half-way, duplicates of a character
Add a crowd	Out-of-focus passers-by in the background	Extras who speak or act
Light them up	Every existing lamp, candle, lantern on	Adding lamps that are not there

FAQ

Will the crowd look at the camera?

No. They are kept in the background, out of focus and going about their business.

Can I clear the background and light the lamps in one go?

No. One change per edit; run the second on the result.

Does clearing the background remove my characters?

No. Characters the shot names stay.

Does it change the next segment?

No. Change the storyboard's background people line for a whole scene.

Empty the street, fill the hall

One change per clip, a price on the button, the original kept.

Open your project

Updated September 30, 2026