Remove colour banding or compression artefacts.
Two prototypes:
Filename: UncountourV2.fx
Download as zip-file: lwks.com/../../../../UncountourV2.zip
and:
Filename: Artifacts-blur_20.fx
Download as zip-file: lwks.com/../../../../Artifacts-blur_20_03.zip
Effect descriptions:
See: Lightworks Forum
(And in the other linked posts of this linked thread.)
Other test effects with probably only limited benefits:
Filename: Dithering (colour depth) 03.fx
Name: “Dithering of color depths from 16 or 32 bit to 8 bit”
Download as zip-file: www.lwks.com .. Ditheringcolourdepth03_03.zip
Effect description: RGB-colour depth dithering (Invisible minimum grain size)
Important limitation: Only useful for RGB exports.