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These controls let you adjust how to composite the glow effect against the original image.
— Normalize Brightness: This checkbox scales the brightness of the glow per frame. The Aperture Diffraction effect will keep to a consistent overall brightness as the scene changes.
— Brightness: Lets you adjust the intensity of the glow effect.
— Colorize: Lets you tint the glow effect using the Color control that appears below.
Glow
A sophisticated, soft glow effect that’s highly customizable with only a few key parameters.
— Select Output: Lets you preview the image with different stages of the glow effect applied, viewing the Shiny Regions, the Glow Alone, or the Glowing Image.
— Shine Threshold: Defines the luminance level at which glow is triggered to appear on the image.
— Alpha Masks Light Sources: Check this box to use the input Alpha channel to exclude sources in those areas from casting light rays.
— Alpha Limits Effect: Check this box to use the input Alpha channel for compositing purposes. Unchecking means the input Alpha is ignored.
Shape and Spread
— Spread: Defines how far out shine extends from areas of the picture that trigger it.
— H/V Ratio: Lets you adjust the proportion of horizontal to vertical spread, allowing you to create “streaky” shine that extends farther in a particular dimension.
— Relative Spread Red/Green/Blue: Lets you adjust the spread within each color channel by a different amount, simulating a kind of chromatic aberration in the glow.
Color and Composite
— Gain: Adjusts the brightness of the glow effect.
— Gamma: Adjusts the spread of the glow effect and how it fades with distance.
— Saturation: Adjusts the intensity of the glow’s color.
— Color Filter: A color picker and eyedropper let you choose a color with which to tint the glow.
— Glow framing: Lets you choose what happens when shine hits the edge of the frame, whether it’s amplified by “Reflect in Camera” or whether it’s moderated by a “Vignette” effect.
— Composite Type: Lets you choose a composite mode to use to blend the glow effect with the image. Defaults to Screen, which is good for gentle glows. Add lets you create hotter, more intense glows, while other composite modes let you create other varied effects.
— Opacity: Lets you adjust the transparency of the glow effect and is a fast way of “easing off” of a glow that you otherwise like, but that’s too intense for the shot at hand.
— Invert Effect: Checking this box inverts the Glow parameters, so darker areas now affect brighter regions instead of the other way around.
— Bright Region Recovery: Adjust this slider to reclaim some image detail in areas that are blown out by the glow.