Nodes · Keying
KeyerSample
Keyingv1core
Overview
The sample-driven keyer: arm 🎯 in the panel, Ctrl+click the viewer — screen samples say what leaves, foreground samples say what stays. Chroma-space distances key an unevenly lit screen from a few clicks.
How to
How-to
- Arm 🎯 in the panel; Ctrl+click screen samples (what leaves) and foreground samples (what stays) in the viewer.
toleranceandsoftnessshape the matte;view = matteto judge.
Inputs
| Input | What it takes |
|---|---|
| in | the image this node works on |
| insideMask | — |
| outsideMask | — |
Outputs
| Output | Type |
|---|---|
| out | Image |
Parameters
| Parameter | Type | Default | What it does |
|---|---|---|---|
| screen_samples | Text | Colours sampled from the screen (Ctrl-click in the viewer). The key learns the screen from these. | |
| fg_samples | Text | Colours sampled from the foreground — what must stay opaque. | |
| tolerance | Float | 0.12 | How far from the sampled screen colours a pixel may drift and still key out. |
| softness | Float | 0.15 | The width of the ramp between keyed-out and kept. |
| despill | Bool | true | Pull the screen colour out of the foreground's edges and fine detail after keying, so hair and glass stop glowing green. |
| view | Choice | result | What the viewer shows: the result, the matte, a status map (core / edge / screen), the overlay, or the despill alone. resultmattestatusoverlaydespill |
| disabled | Bool | false | Bypass: the node passes its first input through untouched (D in the graph). The knobs keep their values for when it comes back. |
| label | Text | A note shown under the node in the graph — what this node is FOR. Never affects the render or the cache. | |
| hide_input | Bool | false | Draw the node without its input wire — a tidy graph for a node whose source is obvious (a Dot, a viewer tap). |