Channel
Selects the source channel used for thresholding.
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Threshold
Hard or soft channel thresholding
Converts a selected channel into thresholded regions with independent threshold, softness, repeat and inversion controls.
This tool belongs to the Krokodove set integrated into DaVinci Resolve 21 and Fusion Studio 21. See the complete Krokodove node list and the comparison with native Fusion tools.
Threshold
DaVinci Resolve · Fusion
Converts a selected channel into thresholded regions with independent threshold, softness, repeat and inversion controls.
Overview
What Threshold does
Converts a selected channel into thresholded regions with independent threshold, softness, repeat and inversion controls.
Threshold converts a continuous channel into a controlled pass/fail range. Channel chooses the data being tested; Threshold and Softness define the boundary, while the lock controls keep channel behavior synchronized when the output must remain a clean technical matte.
Repeat and Ping-Pong can turn the threshold into a procedural repeating pattern rather than a simple matte. For transparent sources, use the render and premultiplication options carefully so hard threshold decisions do not leave dirty RGB fringes at semi-transparent edges.
Mental model
Think of Threshold as a gate: values on one side pass, values on the other side do not. Softness controls how gradual the gate is instead of making it binary.
Common uses
Generate mattes from luminance
Isolate bright or dark image regions
Create posterized graphic masks
Build procedural repeating bands
Prepare alpha for matte processing
Flow anatomy
Inputs & outputs
The port structure shows how this node fits into a Fusion graph.
Image Input
Source image for the operation.
Threshold
Fusion node
Threshold Output
The processed result from this node.
Inspector
Important parameters
Start with these controls before reaching for more complicated workarounds.
Invert
Reverses the threshold result.
Lock Threshold
Links Threshold so they change together.
Threshold
Sets the transition point between rejected and accepted values.
Lock Softness
Links Softness so they change together.
Softness
Controls transition width around the threshold.
Lock Repeat
Links Repeat so they change together.
Repeat
Repeats the threshold pattern across the value range.
Ping-Pong
Alternates repeated threshold bands.
Super-Sampling
Improves quality on fine or animated threshold transitions.
Super-Sampling Filter Size
Sets supersampling quality for cleaner rendered edges.
Higher values improve quality at additional render cost.
Pre-Divide / Post-Multiply
Handles premultiplied edges more safely.
Practical setup
A reliable workflow
- 1
Choose the source channel.
- 2
Set Threshold while viewing the matte clearly.
- 3
Add Softness only where hard transitions look artificial.
- 4
Invert if the wrong region is selected.
- 5
Use the result as a matte or feed it into further cleanup.
Typical node chain
Input→
Threshold→
Output
Examples
Where this node fits in real work
Luma matte
Extract bright regions of a plate.
MediaInThresholdMatteControl
Graphic bands
Repeat the threshold to create procedural value stripes.
FastNoiseThresholdColorCorrector
Troubleshooting
Common mistakes
Thresholding the wrong channel
Using zero softness on noisy footage
Overusing Repeat when a simple matte is needed
Ignoring premultiplication on transparent graphics
Production notes
Practical tips
View the result as a matte while setting Threshold.
Pre-blur noisy footage slightly when the edge chatters frame to frame.
Related nodes