Process node
A Process node applies a single effect to a video stream. Chain several together to combine effects.
Add it: right‑click the empty canvas → Add Process Node → pick one:
| Effect | What it does | Settings |
|---|---|---|
| Crop | Trim the frame to a rectangle | Draw the crop region over a preview |
| Flip | Mirror the frame | Direction: Horizontal / Vertical / Both |
| Rotate | Rotate the frame in 90° steps | Angle: 0° / 90° / 180° / 270° |
| Opacity | Fade the whole stream | Opacity 0–100% |
| Chroma Key | Knock out a colour (green‑screen) | Key Colour, Threshold, Smoothness |
| Blur | Soften the image (GPU, two‑pass) | Radius 0–64 px |
| Sharpen | Add edge detail | Amount 0.00–3.00 |
| Keystone / Perspective | Correct or warp perspective | Drag the 4 corners (+ Reset) |
| Polygonal Masking | Mask to a freeform polygon | Add points, "Mask outside (invert)", Clear Points |
| Remove Background | AI subject cut‑out (no green screen) | None — appears only on builds with segmentation |
The old separate Flip Horizontal and Flip Vertical entries are now a single Flip node with a direction setting. Existing projects that used the old nodes still load correctly.
Ports
Every Process node has one blue input (left edge) and one blue output (right edge). Wire an Input node's output — or another Process node's output — into the input, and take the output onward to a Layer node or A/B Select node.
Editing an effect
Click Edit on a node to open its settings. For most effects the dialog reads your values when you click OK and previews as you adjust, so you see the real result before committing.
- Crop — draw the crop region over a live preview of the incoming stream.
- Chroma Key — pick the key colour and dial in Threshold (how close a colour must be to be removed) and Smoothness (edge softening).
- Keystone / Perspective — drag the four corner handles to reshape the frame. The editor shows a live warped preview so you see the exact output, plus a dashed outline of the original bounds. You can scroll to zoom the preview and drag corners outside the frame (there's extra overscan room) for strong perspective pulls. Reset restores square corners.
- Polygonal Masking — click to drop polygon points around the area to keep; enable Mask outside (invert) to hide inside the shape instead, or Clear Points to start over.
Splice into a connection
You can drop a Process node directly onto an existing wire. Drag the node over a connection until the wire lights up with a white glow, then release — Prism splices the node into that link, rewiring upstream → node → downstream automatically. This also works for Audio effect nodes.
Chaining
Effects apply in the order the nodes are connected. For example:
Input → Crop → Flip → Blur → Layer
Put crops, flips, and keys before you stack a stream into a Layer node, so the composited result already has the effect applied.