3D Compositing with Action > Action: Media > Adding Effects to Media >

# Blurring a Clip

To blur the front, matte clip, or back clip for the selected media, use the Xblur and Yblur fields. The Xblur field controls the amount of blurring on the horizontal (X) axis, and the Yblur field controls the amount of blurring on the vertical (Y) axis.

NoteIf you apply the media to more than one surface, all the surfaces are blurred.

(a) Xblur(b) Yblur(c) Gaussian Blur

You can use a Gaussian (Gaussian enabled) or a Box blur (Gaussian disabled):

- Gaussian blur has rounded, smoother edges. It is a better blur for animation because it can be blurred on a subpixel level (0.00).
- Box blur has rectangular, rougher edges.

To blur the front clip of media:

1. In Action, click Media.
2. Select the front media.
3. To use a Gaussian blur, double-click the Gaussian field (otherwise a Box blur is applied).
4. Set the blur using the Xblur and Yblur values, and then negate the values for the Blur fields on the matte media. For example, to blur only the front clip 10 pixels on both axes, set the front Xblur and Yblur fields to 10 and the matte Xblur and Yblur fields to -10.
   Tip Alt-drag over the XBlur or YBlur field to change both values proportionally.

To blur the matte clip of media:

1. In Action, click Media.
2. Select the matte media.
3. To use a Gaussian blur, double-click the Gaussian field (otherwise a Box blur is applied).
4. Set the matte Xblur and Yblur fields. Blurring only the matte clip produces a softer edge on the surface of the front clip.
   Tip Alt-drag over the Xblur or Yblur field to change both values proportionally.