Mask, Cutout & Chroma Key

Learn how to remove backgrounds, replace green screens, add outlines, and create clean video masking effects.

Updated August 21, 2026 · 4 min read

Replace BG-Image/Color

1. Select the clip on the main track and tap [BG].

Select the clip on the main track and tap BG

2. Select the clip on the main track and tap [BG].

Select the clip on the main track and tap BG

Create a unique atmosphere by changing the background.

Video Cutout

1. Tap the video clip, then tap [Cutout].

Tap Cutout

2. Tap [Cutout] to remove the background. Adjust Feather and Expand for better results.

3. Tap [Stroke] to add an outline.

Green Screen - Chroma

1. Tap the [Chroma] to enter color sampling and removal.

Enter color sampling and removal

2. Use the color picker tool to select the color you want to remove, then adjust the [Intensity] and [Spill] to achieve a better effect.

Mask

1. Tap the [Mask] to add a shape mask to the material.

Add a shape mask to the material

2. Select the desired mask style and adjust its size accordingly.

Frequently Asked Questions

Common questions about replacing backgrounds, removing subjects, using Chroma, and applying masks in VN.

What is the difference between Cutout, Chroma, and Mask?

[Cutout] automatically removes a background around a subject. [Chroma] removes a selected color, such as a green-screen background. [Mask] shows or hides part of a layer using a selected shape.

How can I improve the edge of a Video Cutout?

Adjust [Feather] to soften the edge and [Expand] to increase or reduce the selected area. Preview the subject over the intended background while making adjustments.

What do Intensity and Spill do in Chroma?

[Intensity] controls how strongly the selected color is removed. [Spill] reduces traces of that color around the subject, such as a green tint from a green screen.

Do these tools modify the original video on my device?

No. Background, Cutout, Chroma, and Mask changes are applied to the clip inside the VN project and do not modify the original video stored on your device.

Can I use Mask, Cutout, and Chroma offline?

Yes. [Mask], [Cutout], [Chroma], and background editing run locally on your device and can be used without an internet connection. More about functions that can run while the device is offline can be found in Use VN Without an Internet Connection