Vegas
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Vegas is a Generate effect.
What it does
Section titled “What it does”Vegas finds a contour where the picture’s brightness or transparency crosses a level, and draws a stroke along it.
Parameters
Section titled “Parameters”| Parameter | Control | Range | Default | Unit |
|---|---|---|---|---|
| Source | Dropdown | Luminance · Alpha · Mask/Path | Luminance | - |
| Mask | Masks | This layer’s masks | First mask | - |
| Threshold | Slider | 0 to 100 | 50 | Per cent |
| Width | Slider | 0 to 50; higher | 3 | Pixels at composition size |
| Hardness | Slider | 0 to 100 | 50 | Per cent |
| Segment length | Slider | 1 to 1000; higher | 80 | Pixels at composition size |
| Length | Slider | 0 to 100 | 55 | Per cent |
| Rotation | Dial | Any angle; snaps every 15° while a modifier is held | 0° | Degrees |
| Colour | Colour | Each channel 0 to 4, scene-linear | 1, 0.8, 0.25, 1 | - |
| Opacity | Slider | 0 to 100 | 100 | Per cent |
| Composite on original | Checkbox | On or off | On | - |
| Mix | Slider | 0 to 100 | 100 | Per cent |
| Blend | Dropdown | Normal · Darken · Multiply · Colour burn · Linear burn · Darker colour · Add · Lighten · Screen · Colour dodge · Lighter colour · Overlay · Soft light · Hard light · Linear light · Vivid light · Pin light · Hard mix · Difference · Exclusion · Subtract · Divide · Hue · Saturation · Colour · Luminosity | Normal | - |
| Matte | Layer | Any layer in the composition | None | - |
| Invert | Checkbox | On or off | Off | - |
| Channel | Dropdown | Luminance · Alpha · Red · Green · Blue | Luminance | - |
In the Effect Controls panel:
- Mask is editable while Source is set to Mask/Path.
- Threshold is editable while Source is anything but Mask/Path.
- Matte scales Opacity per pixel: white draws the stroke in full, grey faintly, black nothing at all. Invert reads that matte inverted.
What each control does
Section titled “What each control does”- Source: Luminance finds the contour from brightness. Alpha finds it based on alpha, and Mask/Path draws the stroke round one of the layer’s masks.
- Mask: which mask, while Source is Mask/Path.
- Threshold: thresholds what counts as a contour.
- Width: how thick the stroke is.
- Hardness: how crisp edges are.
- Segment length: the length of one dash and gap.
- Length: how much of one segment is lit, as a percentage.
- Rotation: offsets the dashes along the contour.
- Colour: the stroke’s colour.
- Opacity: how strong the stroke is.
- Composite on original: on, the layer the effect is on draws under the stroke.
- Mix: how much of the result replaces the original.
- Matte and Invert drive the strength of the effect from another layer’s brightness; see Effects.