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Weight Change Percentage

Specifies a threshold value (%) for how much a vertex’s skin weight needs to differ from its neighbor before it is smoothed by the Smooth Skin Weights operation. All vertices whose weights fall outside the threshold are ignored by the Smooth Skin Weights operation.

Preview

When on, the vertices that will be smoothed by the Smooth Skin Weights operation highlight yellow in the scene view when you click Apply. The current Weight Change Percentage value and the roughness of the target skin’s weighting determines which vertices are highlighted.

See Smoothing skin weights.