While catching up on latest Silhouette changes, I came across this new node: Color Estimation - which does a different spin on despill / edge blending, by ‘estimating’ the colors in the semi-transparent area:
https://borisfx.com/documentation/silhouette-2024/index.html#page/silhouette-2024.5/Nodes-Color%20Estimation.html
Doesn’t say much here.
Here’s a demo: https://www.youtube.com/watch?v=7rIynPQ7oU0
Anyone know what exactly it actually does? Doesn’t say it’s ML based, so may be a traditional algorithm, maybe a variation on light wrap, but one that goes both directions.
Presumably you could just pull it in via Silhouette OFX even in a standard Flame key node tree, by just passing it fg, bg, and matte.
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Silhouette’s Color Estimation node is not ML based and was originally part of the Power Matte node. We extracted it from Power Matte to also make it a separate node. When you pass it FG+Alpha, at the last 100% opaque pixel in the alpha, it extends the RGB color outward at that location outward. Hope this helps.
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Thanks @marcopaolini. I was thinking you might jump in 
So in Flame terms this can be done with pixelspread, it seems more or less the same. And pixelspread is already used in that way in Flame keying.