The PaintSS (Paint Soft Selection) panel provides controls for painting a soft selection of sub-objects on an editable poly or Edit Poly object.
Interface

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Blur
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Paint with Blur to soften the outlines of an existing painted soft selection.
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Revert
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Paint with Revert to reverse a soft selection on the active object using the current settings.
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Options
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Opens the Painter Options dialog, with settings for brush-related properties.
- Value
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The maximum relative selection of the painted or reverted soft selection. The values of surrounding vertices within the brush radius fall off towards a value of 0. Default=1.0.
- Size
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The radius of the circular brush used for painting the selection.
- Strength
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The rate at which painting a soft selection sets the painted sub-objects to the maximum value. A high Strength value reaches the full value quickly, while a low value requires repeated applications to reach full value.