How Do You Relight a Video? NadouPro’s Finished-Video Retouching Tool: Relighting

A piece of footage has been shot or generated, and the composition and performance are right, but it still feels like something is missing—the light is too flat and has no mood, or several clips each have their own color tone. The traditional solution is to bring the footage back into editing software and adjust it clip by clip, which is time-consuming and tests your manual skills. A more direct approach is: leave lighting issues to relighting, and color-tone issues to intelligent color grading. Both are completed within NadouPro’s finished-video processing workflow, without regenerating the entire shot.

Relighting: Not Reshooting, Just Re-Lighting

The logic of relighting is to re-render the lighting on existing footage while keeping the image content, motion, and composition unchanged. The direction, color, and intensity of the light can all be changed: a daytime shot can be turned into dusk, and a flat-lit subject can be given a rim of backlight.

When setting up lighting, you can start with several classic lighting patterns:

• Window light: a soft key light from one side, simulating natural light by a window, suitable for interviews and still lifes

• Top light: light from above, creating an oppressive or focused atmosphere

• Backlight: the light source is placed behind the subject to outline the silhouette, one of the most cinematic lighting patterns

• Silhouette: darken the subject and brighten the background, leaving only shape and posture, suitable for emotional shots

• Cross soft light: two angled soft light sources, close to a studio setup with a key light plus fill light

Finer control than presets is customization: directly set the color temperature, brightness, softness, and angle of the light. Describe it in one sentence—"left-side window light, cool blue tone, medium brightness, softened and diffused; right-side fill light, white, low intensity"—and the model can understand and implement it.

When to Use This Tool

The criterion is simple: if the footage is already finished and only the lighting is missing, don’t regenerate it.

Typical scenarios where relighting is suitable include: the light source does not match the mood of the scene, such as using a daytime shot as dusk; the image needs an extra light to shape the form; or you need to unify light direction before combining footage from multiple sources—for example, when a generated clip and a live-action clip need to enter the same timeline, aligning the light direction on both sides first makes the edit feel seamless.

Complete Workflow

Relighting workflow:

1. Open existing video footage on the canvas and choose relighting processing

2. Select the lighting pattern direction, or customize the light source’s color temperature, brightness, softness, and angle

3. After generation, review the result; if the lighting has not landed correctly, adjust the parameters and run it again

The Division of Labor Between Retouching Tools and the Full-Chain Workflow

For existing footage where only the lighting needs to be changed, use the two workflows above; if the shot itself still needs to be built from scratch—camera movement, lens, character, period feel, and lighting effects all defined together—that belongs to the generation stage of the canvas workflow, where photographic parameters and film style are set at the same time during generation. The light-and-color logic of the two paths is consistent, and the look established in the retouching stage can be carried over unchanged when the footage enters a full-chain project.

Take a typical scenario as an example: a brand short film made of six clips, two live-action and four AI-generated. First unify the lighting direction, then apply the same cinematic color grade. The finished film has a completely unified look, without returning to traditional color grading software at any point.

FAQ

Q: Will relighting change the motion and composition in the image?

A: No. It only re-renders the lighting layer; the motion, framing, and composition remain consistent with the source footage.

Q: For this kind of processing versus setting parameters directly during generation, which should I choose?

A: If the footage already exists and only the lighting needs changing, retouching processing is faster; if the shot is still in the construction stage, set the photographic parameters in the canvas generation stage.

Q: Can footage from different sources, such as live action plus generation, use this workflow to unify the look?

A: Yes. This is exactly one of the core uses of relighting—first unify the light direction, then unify the color tone, so footage from multiple sources can enter the same timeline.

Q: About how long does it take to process a video?

A: It depends on the footage duration and model load, usually on the scale of tens of seconds to a few minutes, much faster than manually grading clip by clip in traditional software.

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Contains AI-generated information that may be incorrect. Please verify independently.