Reference / Effects / Blur & sharpen
Updated
Gaussian blur
Gaussian blur is a Blur & sharpen effect.
What it does
Section titled “What it does”Applies an even blur across the whole image.
Parameters
Section titled “Parameters”| Parameter | Control | Range | Default | Unit |
|---|---|---|---|---|
| Radius | Slider | 0 to 500; up to 2000 | 30 | Pixels at composition size |
| Repeat edge pixels | 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:
- Matte scales the blur radius per pixel: white blurs at the full Radius, grey blurs narrowly, black not at all — a blur whose width varies across the frame, which a strength dissolve cannot produce. Invert reads that matte inverted.
What each control does
Section titled “What each control does”- Radius adjusts the size of the blur.
- Repeat edge pixels: on holds the layer’s edge pixels outward. Off blurs the edge into transparency and past it, and the layer grows to hold the blur.
- Mix: how much of the result replaces the original.
- Matte and Invert drive the blur amount from another layer’s brightness, scaled by the blur amounts you set; see Effects.