Composite Sources
Updated: 4 Dec 2023
Composite two image sources to one image.
Composite Sources
Method #
This node composites two image sources to one image.
Parameters
These properties control the core behaviours of the node.
Parameter Details Preview In Viewport
Preview the generated image as an overlay in the viewport.
- Off : No preview is generated.
- RGBA : Preview the image blended with alpha in the viewport.
- RGB : Preview the colour channels in the viewport.
- Alpha : Preview the alpha channel in the viewport.
- PIP : Preview the image blended with alpha in the viewport, in a smaller picture in picture display, on top of the existing content.
Apply PostFX Before Alpha Image Input (Legacy)
When enabled, the alpha input image is applied after the postfx pass, overwriting any effects the postfx would have applied to the alpha channel.
Blend Amount
Changes the opacity of the new effect over the original image.
Use Alpha Channel
Toggle if the alpha channel is used in the composite.
Copy To Alpha Channel
Toggle if alpha values are copied to the output.
Blend Mode
Choose how the images are composited together. More information on blend modes can be found on the blend modes page,
- Composite : The input image is placed over the parent image.
- Linear : The input image is blended linearly with the parent image.
- Add : The input image is added to the parent image, brightening the overall result where the input image is brightest.
- Subtract : The input image is subtracted from the parent image, darkening the overall result where the input image is brightest.
- Multiply : The input image is multiplied by the parent image, darkening and tinting the overall result where the either the input or the parent isn’t white.
- Max : The input and parent images are compared, and the max value per pixel are chosen, mixing the images brightest elements together.
- Min : The input and parent images are compared, and the min value per pixel are chosen, mixing the images darkest elements together.
- Screen : The input and parent images are scene are inverted, multiplied, and then inverted again, resulting in a brighter overall image which maintains the darker details of parent.
- Light : The input image is multiplied with the parent, and then added again, resulting in a brighter image with less contrast.
- Difference : Calculates the absolute difference between the input and parent images per colour channel. The result is often an inversion of the existing colours where the images differ most.
- Exclusion : The input image is multiplied with the parent, then by 2, and the result is subtracted from the parent subtracted from the source. The result is similar to difference, but with lower contrast.
- Dodge : The input image is inverted and then used to divide the parent image, resulting in a brighter and more saturated image.
- Burn : The parent image is inverted and divides by the input image, and the result in inverted. This results in a darker, more contrasty, and more saturated image.
- Negate : Calculates the absolute difference between the input and parent images per colour channel, and inverts the result. The result is the inverse of the difference blend mode, but with better retention of the parent images colours.
- Overlay : Uses the Multiply blend mode for values below 50% grey, and Screen blend mode for values above 50% grey, resulting in an increased contrast as both the darker and brighter areas are exaggerated.
Format
Control the bit depth of the output composited image.
Input 0 Tint
Tint the colour of the parent image.
Input 1 Tint
Tint the colour of the input image.
The properties control the time at which the node is active. See Timeline for editing time segments.
Parameter Details Duration
Control the duration of the node’s time segment.
- Composition Duration : Use the length of the composition for the node’s time segment duration.
- Custom : Set a custom duration for the node’s time segment.
Node Time
The custom start and end time for the node.
Duration (Timecode)
The length of the node’s time segment (in time).
Duration (Frames)
The length of the node’s time segment (in frames).
Time Segment Enabled
Set whether the node’s time segment is enabled or not in the Timeline.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Preview In Viewport |
Preview the generated image as an overlay in the viewport.
|
| Apply PostFX Before Alpha Image Input (Legacy) | When enabled, the alpha input image is applied after the postfx pass, overwriting any effects the postfx would have applied to the alpha channel. |
| Blend Amount | Changes the opacity of the new effect over the original image. |
| Use Alpha Channel | Toggle if the alpha channel is used in the composite. |
| Copy To Alpha Channel | Toggle if alpha values are copied to the output. |
| Blend Mode |
Choose how the images are composited together. More information on blend modes can be found on the blend modes page,
|
| Format | Control the bit depth of the output composited image. |
| Input 0 Tint | Tint the colour of the parent image. |
| Input 1 Tint | Tint the colour of the input image. |
The properties control the time at which the node is active. See Timeline for editing time segments.
| Parameter | Details |
|---|---|
| Duration |
Control the duration of the node’s time segment.
|
| Node Time | The custom start and end time for the node. |
| Duration (Timecode) | The length of the node’s time segment (in time). |
| Duration (Frames) | The length of the node’s time segment (in frames). |
| Time Segment Enabled | Set whether the node’s time segment is enabled or not in the Timeline. |
| Name | Description | Typical Input |
|---|---|---|
| Composite Source | Source image to be composited with. | Video Loader |
| Effect Mask | Mask out areas that Post-FX applied to this node won’t be applied. | Video Loader |
| Alpha Image | Use a separate video nodes luminance values to overwrite the alpha channel of the image. | Video Loader |