Threshold |
When enabled, will apply the effect based on whether or not the RGB value of the source image meets or exceeds the luminance threshold.
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Luminance Threshold |
Defines the cut off luminance value and can be used to define where the effect will be applied.
When the threshold is enabled, pixels in the source image with a perceived brightness above this value will be affected.
If set to 0, the light being emitted will appear black.
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2D Path
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When this option is enabled, the X and Y-axis parameters are controlled by the same 2D path function. |
Separated
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When this option is enabled, the X and Y-axis parameters are independent from one another. |
(x) Axis |
The direction of the shine effect horizontally. The shine will be concentrated along the X-axis.
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(y) Axis |
The direction of the shine effect vertically. The shine will be concentrated along the Y-axis. |
Ray Length |
Refers to the radius of the blur that will define the distance that the effect will extend away from the defined centre point. |
Fall Off |
The value that specifies how quickly the illumination will decline as the light rays extend into the surrounding areas. |
Alpha Gamma |
A non-linear gamma correction to the alpha channel of the applied effect.
A value of 1 leaves the alpha unchanged.
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Alpha Black Output Point |
Defines the minimum opacity value. |
Alpha White Output Point |
Defines the maximum opacity value. |
Use Source Colour |
When enabled, the effect will adopt the colour of the source image to create the blur effect.
When disabled, the user can select the colour of the blur effect.
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Colour |
The RGBA value chosen for the blur effect when the Use Source Colour is disabled. |
Colour Gain |
A multiplier that scales the colours of the effect being output. |
Blend Mode |
The blend mode applied to the shine effect.
You may select from the following:
- Normal:Composites the image without any specific blending effect.
- Erase:Subtracts the overlay pixel's alpha from the underlay pixel, "cutting out" the overlay from the underlay. The overlay pixel's colour information is ignored.
- Invert:Inverts the underlay pixel proportionally to the alpha value of the overlay pixel. The overlay image hence acts as a "matte" for an invert effect.
- Replace:Ignores the underlay pixel completely, outputting the overlay pixel as if nothing existed behind it. This applies to all overlay pixels that have an alpha value of at least 1, so the negative space of the overlay image will not hide the underlay image. If the overlay pixel is not fully opaque, it will be mixed with black.
- Colour Burn:Darkens each channel in the underlay pixel with the darkness value of the corresponding channel in the overlay pixel, by increasing the contrast of the underlay pixel.
- Darken:For each channel, uses the value that is the darkest between the underlay pixel and the overlay pixel.
- Linear Burn:Darkens each channel in the underlay pixel with the darkness value of the corresponding channel in the overlay pixel, by reducing the brightness of the underlay pixel.
- Multiply:Multiplies the value of each channel in the underlay pixel with the value of each channel in the overlay pixel, treating those values as ratios. Multiplying anything with black will result in black, and multiplying anything with white will leave the colour unchanged.
- Colour Dodge:Lightens each channel in the underlay pixel with the brightness value of the corresponding channel in the overlay pixel, by decreasing the contrast of the underlay pixel.
- Lighten:For each channel, uses the value that is the brightest between the underlay pixel and the overlay pixel.
Linear Dodge:Lightens each channel in the underlay pixel with the brightness value of the corresponding channel in the overlay pixel, by increasing the brightness of the underlay pixel.
- Screen:The reverse of multiply. Multiplies the reverse value of each channel in the underlay and overlay pixel, treating those values as ratios. Multiplying anything with white will result in white, and multiplying anything with black will leave the colour unchanged.
- Hardlight:This screens overlay pixels with a value above 50% onto underlay pixels, and multiplies overlay pixels with a value below 50% onto underlay pixels. The brighter the overlay pixel is, the more intense the screen effect will be. The darker the overlay pixel is, the more intense the multiplying effect will be. Blending any colour with white or black will result in white or black, and blending a colour with plain grey will leave the colour unchanged.
- Linearlight:This linear dodges overlay pixels with a value above 50% onto underlay pixels, and linear burns overlay pixels with a value below 50% onto underlay pixels. The brighter the overlay pixel is, the more intense the linear dodging effect will be. The darker the overlay pixel is, the more intense the linear burning effect will be.
- Overlay:Like hardlight, exept it screens or multiplies the underlay pixel over the overlay pixel, based on the value of the underlay pixel.
- Pin Light:For each channel, if the overlay pixel's value is above 50%, use the lightest pixel between the underlay and overlay pixels. If the overlay pixel's value is below 50%, use the darkest pixel between the underlay and overlay pixels.
- Softlight: Each channel of the overlay pixel lightens or darkens the corresponding channel of the underlay pixel on a softer scale. The effect is proportional to how dark or bright the overlay pixel is, but inversely proportional to how dark or bright the underlay pixel is.
- Vividlight: This colour dodges overlay pixels with a value above 50% onto underlay pixels, and colour burns overlay pixels with a value below 50% onto underlay pixels. The brighter the overlay pixel is, the more intense the colour dodging effect will be. The darker the overlay pixel is, the more intense the colour burning effect will be.
- Difference:For each channel, this takes the darkest pixel among the overlay and underlay pixels, subtract it from the lightest pixel, and outputs the result.
- Divide:For each channel, this divides the value of the underlay pixel by the value overlay pixel. Both values are treated as ratios, so the resulting colour is brighter. A white overlay pixel will leave the underlay colour unaffected, and a black overlay pixel will always result in white.
- Exclusion:Adds the overlay and underlay pixel, then subtracts the multiplied value of both pixels twice. This results in an effect similar to Difference, except that while the Difference mode produces consistently high contrast pixels, the contrast of the resulting pixels with the Exclusion mode is proportional to how dark or bright the overlay pixels are.
- Subtract:For each channel, subtracts the value of the overlay pxiel from the value of the underlay pxiel. For example, if the underlay pixel is white, and the overlay pixel is dark gray, the resulting pixel will be light gray. Likewise, if the underlay pixel is yellow, and the overlay pixel is red, the resulting pixel will be green, as yellow is a mix of green and red.
- Colour:Outputs a colour with the hue and saturation of the overlay pixel, and the luminosity of the underlay pixel. The overlay layer can hence be used to "colourize" the underlay layer.
- Hue:Outputs a colour with the luminosity and saturation of the underlay pixel and the hue of the overlay pixel.
- Saturation:Outputs a colour with the luminosity and hue of the underlying colour, and the saturation of the source colour.
- Luminosity:Outputs a colour with the hue and saturation of the underlay pixel and the luminosity of the overlay pixel. This is the reverse of the Colour blending mode.
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