Glow controls

Adjust the following controls for the Glow effect:

Glow Based On

Specifies the properties on which you want to apply the glow.

Glow Threshold

Sets a threshold as a percentage brightness to which the glow is not applied. A lower percentage produces more glow; a higher percentage produces less.

Glow Radius

Specifies the radius, in pixels, that the glow extends out from the bright areas of the image. Larger values produce diffuse glows; smaller values produce glows with sharp edges.

Glow Intensity

Sets the brightness of the glow. Higher values produce brighter glows.

Composite Original

Specifies how to composite the effect with the layer. On Top places the glow on top of the image, using the blending method selected for Glow Operation. Behind places the glow behind the image, creating a backlighting effect. None separates the glow from the image.

To reduce the layer to the glow only, choose None for Composite Original and None for Glow Operation. To achieve a glow effect for text that knocks out (blocks) all layers below it, choose Silhouette Alpha for Glow Operation. These glow effects are more noticeable when the image has a feathered edge.

Glow Colors

Specifies the colors that glow. A & B Colors creates a gradient glow using the colors specified by using the Color A and Color B controls. Arbitrary Map creates a gradient glow using colors specified in an arbitrary map file created using the Curves dialog box in Adobe Photoshop. Selecting this option displays a standard Open dialog box for locating the arbitrary map file. For information about arbitrary maps, see the Adobe Photoshop online Help topic "Using the Curves command."

Color Looping

Specifies the beginning and ending colors for the glow, if A & B Colors is selected for Glow Colors. The Sawtooth options begin with one color and end with the second color. The Triangle options begin with one color, move to another, and then end with the first.

Color Loops

Creates multicolor ringing in the glow, when you select two or more loops. A single loop cycles through the gradient (or arbitrary map) specified for Glow Colors.

Color Phase

Begins color loops at a specific point in the cycle. Specify a phase angle in the Color Phase control. By default, color loops begin at the origin of the first loop.

A & B Midpoint

Specifies the midpoint of the gradient if you've selected A & B Colors for Glow Colors. The midpoint specifies the balance between the two colors used in the gradient. Lower percentages use less of the A color. Higher percentages use less of the B color.

Color A, Color B

Specify the colors that glow.You can choose to use these colors by choosing them from the Glow Colors menu.

Glow Dimensions

Specifies whether the glow is horizontal, vertical, or both.