Background Plate Subtract

Updated: 25 Feb 2025

Add a Background Plate Subtract effect to an image.

Method #

This node remove the background from a video by taking a picture or supplying one of before, without the subject in it, then it keeps track of whats new when something moves in front.

Parameters

Attributes

These properties control the core behaviours of the node.

Parameter	Details
Active	Enables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance.
Blend Amount	Changes the opacity of the new effect over the original image.
Blend Mode	Choose how the image blends with the scene. See Blend Modes for details.
Blend Mode (Alpha)	Change how the generated effect blends with the parent image alpha.
Affected Channels	Toggle which of the RGBA channels are affected by the effect.
Capture Background Plate	Capture the background plate
Difference Threshold	Difference between the 2 images
Difference Scale	Difference Scale
Output Mask	Show generated mask
Show Background Plate	Show the used backround plane

Inputs

Name	Description	Typical Input
Background Plate	TBC	TBC
Active	TBC	TBC
Blend Amount	TBC	TBC
Difference Threshold	TBC	TBC
Difference Scale	TBC	TBC
Capture Background Plate	TBC	TBC
Value Nodes	TBC	TBC