AfterEffects

Spill Suppressor effect

The Spill Suppressor effect removes traces of the key color from an image with a screen that’s already been keyed out. Typically, the Spill Suppressor is used to remove key color spills from the edges of an image. Spills are caused by light reflecting off the screen and onto the subject.

If you’re not satisfied with the results from using the Spill Suppressor, try applying the Hue/Saturation effect to a layer after keying, and then decrease the saturation value to de-emphasize the key color. (See Hue/Saturation effect.)

This effect works with 8-bpc and 16-bpc color.

Original greenscreen (top left) leaves green glow when keyed out (bottom left). Spill Suppressor removes glow (bottom right).

Use the Spill Suppressor effect

  1. Select the layer and choose Effect > Keying > Spill Suppressor.
  2. Choose the color you want to suppress in one of the following ways:

    • If you already keyed out the color with a key in the Effect Controls panel, click the Color To Suppress eyedropper, and then click the screen color in the key’s Key Color swatch.

    • In Spill Suppressor, click the Key Color swatch and choose a color from the color wheel.

    Note: To use the eyedropper in the Layer panel, choose Spill Suppressor from the View menu in the Layer panel.
  3. From the Color Accuracy menu, choose Faster to suppress blue, green, or red. Choose Better to suppress other colors, because After Effects may need to analyze the colors more carefully to produce accurate transparency. The Better option may increase rendering time.
  4. Drag the Suppression slider until the color is adequately suppressed.