Twirl
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Twirl is a Distortion effect.
What it does
Section titled “What it does”Spinning a circular patch of the picture around its own centre so that straight lines become spirals.
Parameters
Section titled “Parameters”| Parameter | Control | Range | Default | Unit |
|---|---|---|---|---|
| Angle | Dial | Any angle; snaps every 15° while a modifier is held | 90° | Degrees |
| Radius | Slider | 0 to 2000; higher | 650 | Pixels at composition size |
| Centre X | Slider | 0 to 3840; any value by typing | 960 | Pixels at composition size |
| Centre Y | Slider | 0 to 2160; any value by typing | 540 | Pixels at composition size |
| 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:
- Matte scales Angle per pixel: white twirls the full Angle, grey less, black not at all. Invert reads that matte inverted.
What each control does
Section titled “What each control does”- Angle: the amount to rotate around the centre.
- Radius: how wide the circle is.
- Centre X and Centre Y: the centre point of the twirl.
- 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.