Method
This effect blurs the bright parts of the image over the darker parts of the image. The pixels of the incoming image that are brighter than the threshold are isolated and blurred, then added to the incoming image. This has the effect of blowing out the highlights of the image. This effect can be used to simulate overexposure of brightly lit objects.
The Glow Mask input can be used to supply a mask image to modulate the amount of glow per pixel.
!This node is resolution dependent.
| Raw texture |
Processed texture |
Modified texture |
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![]( "Raw Guitar Image") |
![]( "Glow") |
![]( "Glow") |
| Example Nodegraph |
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Attributes
| Name |
Description |
|---|
| Active |
Turn the effect on or off. Values < 0.1 will turn the effect off, and deferred rendering must be on. |
| Blend Amount |
Changes the opacity of the new effect over the original image. |
| Blend Mode (RGB) |
Change how the generated effect blends with the parent image RGB. |
| Blend Mode (Alpha) |
Change how the generated effect blends with the parent image alpha. |
| Intensity |
The intensity of the effect that is applied. |
| Blur Scale |
How far the blur should push out. This is multiplied by the distance of the pixel from the center of the image. |
| Softness |
Controls the size of the blur highlight. |
| Threshold |
The luminance threshold at which a pixel will contribute to the effect. |
| Threshold Mode |
Select how the Threshold is calculated.
- RGB, The glow effect is done on the RGB values individually.
- Luminance, The glow effect is done on the Luminance values for all objects in the scene.
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| Apply to Opaque Objects Only |
Toggle whether the effect only applies to opaque objects. |
Affect Channels
Select which of the RGBA colour channels are affected by the effect.
Blur Shaping
| Name |
Description |
|---|
| Blur Shaping X |
How much the glow will affect the X axis. |
| Blur Shaping Y |
How much the glow will affect the Y axis. |
Chromatic Shift
| Name |
Description |
|---|
| Chromatic Shift Red |
Controls how much of the glow is shifted towards red. |
| Chromatic Shift Green |
Controls how much of the glow is shifted towards green. |
| Chromatic Shift Blue |
Controls how much of the glow is shifted towards blue. |
Inputs
| Name |
Description |
Typical Node Input |
|---|
| Glow Mask Image |
Use a mask image to control where the output is most or least affected by the effect, based on the mask images luminance. |
Image Plane |
| Affected Objects |
Change which objects are affects by the effect. by default, all objects are affected. |
3D Object |
| Active |
Turn the effect on or off. Values < 0.1 will turn the effect off, and deferred rendering must be on. |
Envelope Modifier |
Outputs
There are no outputs from this node.
