GM_MATTE_EDGE

This tool helps you create an outline of your alpha shape and adjusting it.

METHOD / Merge In/Out

Merges the inner and outer parts which can be useful creating blurry edge.

METHOD / Separate In/Out

Separates the inner and outer parts which can be useful creating blurred edge only to for the inner or outer part.

OUTSIDE / Size

Allows you to adjust a size of the outer part of the matte.

OUTSIDE / Blur

Allows you to adjust a amount of blur of the outer part of the matte.

OUTSIDE / Mix
Allows you to adjust a mix of the oute
r part of the matte.

INSIDE / Size

Allows you to adjust a size of the inner part of the matte.

INSIDE / Blur

Allows you to adjust a amount of blur of the outer part of the matte.

INSIDE / Mix

Allows you to adjust a mix of the inner part of the matte.

PREMULT

Allows you to premultiply the modified matte with the RGB values.

MIX

Allows you to adjust the overall alpha mix over the original alpha.

Hope you will find it useful! 

 

Here's the GitHub link ( just select the text and copy to Nuke )

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