Nodes · Comp
Copy
Compv2coreConcat: Pointwise
Overview
Copies channels from A into B — classically the matte into the beauty before Premult.
How to
How-to
- Wire the stream that keeps its picture into B and the stream with the channel you want into A.
- Pick the channel to copy (an alpha from a key onto the plate is the common case).
- The picture stays B's; only the chosen channel changes.
Inputs
| Input | What it takes |
|---|---|
| B | the background — **B decides the format** |
| A | the foreground, composited over B |
| mask | limits the effect to this matte — the engine's universal mask slot, applied for every node that declares it |
Outputs
| Output | Type |
|---|---|
| out | Image |
Parameters
| Parameter | Type | Default | What it does |
|---|---|---|---|
| layer | Text | alpha | Which channels or layer the node reads or writes. |
| 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). |