Glow

Brief Description

Enhance bright areas of the image by adding a glow using a Bloom filter

Controls

Parameter / Script Name	Type	Default	Function
`Enabled / enabled`	Boolean	On
`Red / process_red`	Boolean	On	Enable the red channel in output. Otherwise if there's a source the content of the main source is returned instead, else 0.
`Green / process_green`	Boolean	On	Enable the green channel in output. Otherwise if there's a source the content of the main source is returned instead, else 0.
`Blue / process_blue`	Boolean	On	Enable the blue channel in output. Otherwise if there's a source the content of the main source is returned instead, else 0.
`Alpha / process_alpha`	Boolean	On	Enable the alpha channel in output. Otherwise if there's a source the content of the main source is returned instead, else 0.
`Output / outputMode`	Choice	Glow Plus Source	Glow Plus Source: Outputs the glow added to the source image Glow Only: Outputs the generated glow only Glow Map: Useful to adjust highlights and hue isolation
`Minimum Highlights / isolateHighlights`	Float	0.25	Minimum intensities affected by the glow.
`Maximum Highlights / isolateHighlightsHigh`	Float	1	Maximum intensities affected by the glow.
`Enable Hue Isolation / enableIsolateHue`	Boolean	Off	If enabled, the Isolate Hue limits areas of the glow.
`Isolate Hue / isolateHue`	Color	0, 0, 0, 0	The glow affects only regions matching this hue when Hue Isolation is enabled.
`Size / size`	Float 2D	3, 3
`Ratio / ratio`	Float	2	Ratio between successive kernel sizes of the bloom filter. A value of 1 disables bloom.
`Downscale Threshold / downscale_threshold`	Float	15	Downscale images before blur to speed up processing when blur size exceeds this threshold.
`Filter / Filter`	Choice	Gaussian	Gaussian Box Triangle Quadratic
`Iterations / iterations`	Float	5	Number of kernels used in the bloom filter.
`Rotate / rotate`	Float	0	Rotates the glow.
`Gain / gain`	Color	1, 1, 1, 1
`Gamma / gamma`	Color	1, 1, 1, 1
`Saturation / saturation`	Color	1, 1, 1, 1
`Blend Mode / blendMode`	Choice	Add	Add: Ac + Dc — Adds source to destination. Color Dodge: if Ac < 1 → min(1, Bc/(1 − Ac)); else 1. Lighten: max(Ac, Bc). Linear Dodge: min(Ac + Bc, 1). Screen: Ac + Bc − Ac × Bc. Hard-light: multiply or screen depending on Ac. Hard Mix: vivid-light threshold. Linear Light: linear‑burn or linear‑dodge depending on Ac. Overlay: multiply or screen depending on Bc. Pin Light: removes mid‑tones. Soft Light: multi‑branch soft light formula. Vivid Light: color burn/dodge. Difference: abs(A − B). Divide: Ac / Bc if valid; else 0. Exclusion: Ac + Bc − 2AcBc. Minus: Ac − Bc. Subtract: Bc − Ac. Color: SetLum(Ac, Lum(Bc)). Hue: SetLum(SetSat(Ac, Sat(Bc)), Lum(Bc)). Luminosity: SetLum(Bc, Lum(Ac)). Saturation: SetLum(SetSat(Bc, Sat(Ac)), Lum(Bc)). Replace: Ac. Destination Atop: Bca × Aa + Aca × (1 − Ba). Destination Out: Ba × Bc × (1 − Aa). Destination Over: Aa × (1 − Ba) + Bc. Destination In: Bc × Aa. Source Atop: Ac × Ba + Bc × (1 − Aa). Source Out: Ac × (1 − Ba). Normal: Ac + Bc × (1 − Aa). Source In: Ac × Ba. Xor: Ac × (1 − Ba) + Bc × (1 − Aa). Average: (Ac + Bc)/2. Conjoint Over: logic based on Aa ≤ Ba. Disjoint Over: logic based on Aa + Ba ≥ 1. Geometric: 2AcBc/(Ac + Bc). Grain Extract: Bc − Ac + 0.5. Grain Merge: Bc + Ac − 0.5. Hypot: sqrt(Ac² + Bc²). Reflect: Aa²/(1 − Ba). Color Burn: 1 − min(1, (1 − Bc)/Ac). Darken: min(Ac, Bc). Linear Burn: Bc + Ac − 1. Multiply: Ac × Bc. Multiply (Math): Ac × Bc (negatives preserved).
`Add Source / addSource`	Boolean	Off	Add the input image to the output.
`Expand RoD / expandRoD`	Boolean	On
`Crop To Composition Format / crop_source_to_comp`	Boolean	On	Improves performance for large blurs when blurring outside comp regions is not required.
`Mask / mask`	Image	-
`Mix / mix_with_source`	Float	1	Dissolves between the original image at 0 and the effect applied image at 1.