Color Keyer makes a chosen screen color transparent, cleans up the matte and removes the screen color that spills onto the foreground. Its controls follow a Keylight-style workflow.
How to use it
- Select the footage layer and choose Effects ▸ Color Keyer.
- Set Screen Color to the backing color. Click the swatch to pick it from the viewer.
- Set View Mode to Screen Matte. Raise Clip Black until the background is solid, and lower Clip White until the foreground is solid.
- Use Screen Shrink/Grow and Screen Softness to tidy the edge.
- Switch View Mode back to Final.
Parameters
| Name | What it does | Default / range |
|---|---|---|
| Screen Color | The color to key out. | Green (0, 1, 0) |
| Screen Gain | Amplifies the screen signal. Raise it to key dense screens. | 1, 0–2 |
| Screen Balance | 0 = key channel only, 1 = full complement subtraction. | 0.5, 0–1 |
| Screen Pre-blur | Blurs the matte analysis to reduce compression noise. The output image stays sharp. | 0, 0–20 |
| Clip Black | Matte values below this become 0 (solid foreground). | 0, 0–1 |
| Clip White | Matte values above this become 1 (keyed out). | 1, 0–1 |
| Screen Shrink/Grow | Positive chokes the transparent area, negative grows it. | 0, −1–1 |
| Screen Softness | Blurs the screen matte to feather the key edge, in pixels. | 0, 0–100 |
| Despill | Removes key-color fringing from foreground edges. | On |
| Despill Bias | Color used to replace spilled screen color. | Grey (0.5, 0.5, 0.5) |
| View Mode | Final = composited result, Screen Matte = greyscale alpha, Status = diagnostic view. | Final |
With British/international spelling chosen in Preferences, the name reads "Colour Keyer".