The source clip is darkened at areas around parts of the source clip that are brighter than the given threshold, to give an 'orthicon' or 'dark glow' look. Lower the Threshold parameter to produce the orthicon effect in more areas. Adjust the Darkness and Width parameters to give different types of looks.

In the Sapphire Lighting effects submenu.


Source:  The current layer.   The input clip that determines the locations to be darkened.

Background:  Defaults to None.   The clip to combine the glows with. If no background is given, the Source is also used as the Background.

Matte:  Defaults to None.   If provided, the source glow colors are scaled by this input. A monochrome matte can be used to choose a subset of Source areas that will generate glows. A color matte can be used to selectively adjust the glow colors in different regions. The matte is applied to the source before the glows are generated so it will not clip the resulting glows.


Darkness:   Default: 1,  Range: 0 or greater.
Scales the amount of darkening.

Color:   Default rgb: [0 0 0].
Scales the color of the glows. The colors and brightnesses of the glows are also affected by the Source and Matte inputs.

Threshold:   Default: 0.7,  Range: 0 to 1.
Darkening will occur around locations in the source clip that are brighter than this value. A value of 0.9 causes dark glows from only the brightest spots. A value of 0 causes glows for every non-black area.

Threshold Add Color:   Default rgb: [0 0 0].
This can be used to raise the threshold on a specific color and thereby reduce the glows generated on areas of the source clip containing that color.

Darks Width:   Default: 20,  Range: 0 or greater.
Scales the dark glow distance. This and all the width parameters can be adjusted using the Width Widget.

Protect Width:   Default: 0.1,  Range: 0 or greater.
The distance around the bright areas that is protected from darkening. This should normally be less than the value of Darks Width.

Protect Amount:   Default: 1,  Range: 0 or greater.
The amount that the bright areas are protected from darkening.

Width X:   Default: 1,  Range: 0 or greater.
Scales the horizontal glow width. Set to 0 for vertical only.

Width Y:   Default: 1,  Range: 0 or greater.
Scales the vertical glow width. Set to 0 for horizontal only.

Subpixel:   Check-box,  Default: off.
Enables glowing by subpixel widths. Use this for smoother animation of the Width parameters.

Glow From Alpha:   Default: 0,  Range: 0 to 1.
Set to 1 to generate glows from the alpha channel of the source input instead of the RGB channels. In this case the glows will not pick up color from the source and will typically be brighter. Values between 0 and 1 interpolate between using the RGB and the Alpha.

Glow Under Source:   Default: 0,  Range: 0 to 1.
Set to 1 to composite the Source input over the glows.

Source Opacity:   Default: 1,  Range: 0 to 1.
Scales the opacity of the Source input when combined with the glows. This does not affect the generation of the glows themselves.

Bg Brightness:   Default: 1,  Range: 0 or greater.
Scales the brightness of the background. This parameter only has an effect if the background input is provided, and is visible due to a partially transparent Source image or a reduced Source Opacity parameter value.

Invert Matte:   Check-box,  Default: off.
If on, inverts the Matte input so the effect is applied to areas where the Matte is black instead of white. This has no effect unless the Matte input is provided.

Opacity:   Popup menu,  Default: Normal.
Determines the method used for dealing with opacity/transparency.
All Opaque:  Use this option to render slightly faster when the input image is fully opaque with no transparency (alpha=1).
Normal:  Process opacity normally.
As Premult:  Process as if the image is already in premultiplied form (colors have been scaled by opacity). This option also renders slightly faster than Normal mode, but the results will also be in premultiplied form, which is sometimes less correct.

Show Darks Width: Check-box, Default: off.
Turns on or off the screen user interface for adjusting the Opacity parameter.This parameter only appears on AE and Premiere, where on-screen widgets are supported.

See Also:

Sapphire Plug-ins Introduction

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