Posterize
Last updated
Posterize is a Colour effect.
What it does
Section titled “What it does”Posterize recreates the effect of displaying an input in a reduced colour space.
Each of the red, green and blue channels is stepped separately.
Parameters
Section titled “Parameters”| Parameter | Control | Range | Default | Unit |
|---|---|---|---|---|
| Levels | Slider, whole numbers | 2 to 64; up to 255 | 8 | - |
| 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 pulls Levels toward 256 per pixel: white cuts the ladder at Levels, black leaves a step too fine to see. Invert reads that matte inverted.
What each control does
Section titled “What each control does”- Levels: how many shades each channel keeps.
- 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.