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13.1, 12.2, 12.1, 12.0, 11.3, 11.2, 11.1, 11.0, 10 or later
Linux, Mac, Windows
- Fixed a bug that caused the alpha to change wrongly when
weight < 0even if
hardness = 0
- Improved accuracy especially when dealing with large, blurry areas
Modifying alpha channels is probably one of the things I do most when compositing. I've found Nuke's Erode and Dialate nodes to be a bit too limiting and slow for many of these operations. So I made this lightweight tool for growing and shrinking the alpha channel. It works well for both small adjustments, like 'leaning' the center of a gradient slightly towards one side, and big modifications.
Also useful for things such as:
- Despotting a key
- Smoothing out jagged edges
- Making big mask expansions/contractions
How to use
First you 'prep' the alpha channel to only show what you want to use as a base:
Then you 'bend' the result of prep to grow or shrink and add some blur if needed:
Modifying a simple linear ramp illustrates how the hardness and weight knobs affect gradients:
Runs on Blur and Grade nodes so it's simple and fast