Luma Key
Removes pixels based on brightness. Pick a key color with the eyedropper and dial in tolerance and softness.
Luma Key creates transparency based on how close a pixel’s brightness is to a key color. Use the eyedropper to pick a color from the canvas, and the target luminance is derived automatically. Tolerance controls how wide the brightness range around the key is included, and Softness feathers the transition at the boundary edges. Invert flips the matte so the keyed range is kept instead of removed.
The default key color is white, which handles the common “remove white background” case out of the box.
Parameters
Section titled “Parameters”Key Color
Key color to compute target luminance
Matte
Distance from key luminance to include; higher=wider range
Edge feathering (smoothstep) at tolerance boundary
Invert matte: keep keyed range, remove rest
Eyedropper picks a color from the canvas; target luminance is derived using BT.709 coefficients. Default is white (255,255,255) for the common "key out white background" workflow. Backward compatible with old Low/High/Softness Low/Softness High/Mode format.
Usage Tips
Section titled “Usage Tips”- Use the eyedropper to pick the background color directly from the canvas for the most accurate key.
- Start with low Tolerance and increase until the background is fully removed.
- Add Softness to feather the edges for natural-looking transitions.
- Enable Invert to keep only the keyed brightness range instead of removing it.