Removing a Green Screen Background: Step-by-Step

Introduction

Green screen, also called chroma keying, is one of those techniques that looks like magic and turns out to be straightforward once you understand the parts. This guide walks through the whole process: setting up your shot, applying the effect, tuning sensitivity, and cleaning up edges.

By the end you'll have a clean cutout of your subject that you can composite over any background.

What You'll Need

A green sheet, fabric, or paint as your background
Even lighting on the green and on your subject
A video or image of yourself or your subject in front of the green
The Composition Editor in playout.video

If you don't have a dedicated green screen, a flat green wall or a hung green bedsheet works for starting out. The cleaner the green, the better the result.

Step 1: Shoot a Clean Source

Most green screen failures happen at capture, not in software. Get the source right and the rest is easy.

Light the green screen separately from your subject

The biggest mistake is using one set of lights for both. The green screen needs its own lighting so it stays uniformly lit edge to edge. Shadows on the green make keying impossible.

A simple two-light setup:

Light 1: pointed at the green screen, evenly diffused across it
Light 2: pointed at the subject, lighting them as you would for a normal shot

For a more polished look, add a back light on the subject to create separation from the green.

Stand 4–6 feet in front of the green

Standing close to the green causes "green spill", green light reflects off the screen and onto your skin and clothes. Distance reduces spill.

Don't wear green

This includes mint, lime, sage, olive, anything in the green family. The system can't tell the difference between your shirt and the background.

Use HD or higher

Low-resolution video has noisier color, which keys badly. 1080p is the minimum, 4K is even better if available.

Step 2: Bring the Source Into Composition Editor

Upload the video or image to your media library. Open a Composition. Drag the file onto the canvas as a video or image overlay.

Position and size it as you want. The cutout will follow the same position when keying is applied.

Step 3: Toggle On Green Screen Removal

With your video or image overlay selected, find the Green Screen Removal panel in the right sidebar. Toggle it on.

The green disappears immediately. Your subject is now floating on the canvas, ready to composite.

Screenshot suggestion: Green Screen Removal panel with the toggle on, sensitivity slider at 100, and a clean cutout in the canvas behind it.

Step 4: Tune the Sensitivity

The Sensitivity slider runs from 0 to 500. Higher values remove more green.

Start at the default (around 100). Adjust:

If you see green halos around your subject → increase sensitivity
If parts of your subject are being removed (e.g., parts of skin or clothes) → decrease sensitivity
If everything looks fine → leave it

For a well-lit, clean green screen, sensitivities of 80–150 are typical. For a poorly-lit or wrinkled green screen, you may need 200–300.

Step 5: Refine With Advanced Settings

If sensitivity alone doesn't give a clean result, expand Advanced Settings:

Red and Blue Thresholds

Controls how non-green colors are preserved. If your subject's skin or clothing is being keyed by mistake, raising these thresholds tells the system "this red/blue is part of my subject, don't remove it."

Adjust in small increments. The defaults work for most subjects.

Green Minimum

The brightness of green considered for removal. Lower values key dim greens (e.g., shadowy parts of the screen). Higher values key only bright greens.

If you have shadows on your green screen, lower this to clean them up. If you have green tones in your subject (an olive jacket, dark green pattern), raise this to preserve them.

Edge Smoothing

Softens the cutout edges. Increases the apparent quality of the key by blending edges into the background.

A small amount (1–3) gives a natural look. Higher values can make the cutout look slightly fuzzy, useful for stylized looks, less so for crisp broadcast quality.

Spill Removal

Desaturates green tint that bleeds onto your subject. If you can see a slight green cast on your skin or hair, increase spill removal.

Spill removal can over-correct if you have green tones in your subject (e.g., green eyes, green clothing). Watch for it.

Step 6: Add a Background

Now that your subject is keyed cleanly, add a background to composite over.

Drag any image, video, or color onto the canvas as a layer below your subject. Common choices:

A solid color (your brand color)
A branded image (your custom set, location backdrop, themed graphic)
A looping video (animated background, weather scene, abstract motion)
A screen share (you appear "in front of" what you're presenting)

The keyed subject sits on top of the background. Reorder layers if needed.

Step 7: Save the Composition

When you're happy, save. The composition can now be:

Used directly on a stream
Saved as an Overlay Template for reuse
Applied to a playlist or calendar entry

Common Issues and Fixes

Green halos around my subject

→ Increase sensitivity. If that removes parts of your subject, decrease and increase spill removal instead.

Parts of my subject are missing

→ Decrease sensitivity. If you can see what color was being keyed (often a piece of clothing matching the green spectrum), raise the green minimum.

Edges look jagged

→ Increase edge smoothing in small steps.

I look slightly green-tinted even with the screen removed

→ Increase spill removal. Lighting changes (more separation between green-screen lighting and subject lighting) help too.

The background shows through my subject

→ The cutout is over-aggressive. Reduce sensitivity.

Hair or fine details look bad

→ Hair is the hardest part of any chroma key. The fixes are at the source: better lighting, more distance from the green, higher resolution capture. No software fully solves bad hair keys.

Pro Tips

Test before you commit. Set up your green screen, key a test recording, and check the result before recording your real content.
Stick with one setup. Once you've dialed in lighting and settings, use the same setup repeatedly. Don't tune from scratch every time.
Save keyed compositions as templates. Reuse them rather than re-keying.
Consider a non-green screen for some uses. "Subject on a clean dark background" is simpler than full keying for some looks.