Smooth Weight

Blender 5.1+ Paint Tool

Smooth Weight — Download ZIP

Overview

Smooth Weight smooths every unlocked armature deform weight on selected Weight Paint vertices, then normalizes them. Unlike Blender’s built-in smooth, it is not limited to the active (displayed) vertex group.

flowchart LR
  sel[SelectedVerts] --> smooth[SmoothUnlockedDeformVGs]
  smooth --> norm[NormalizeSelected]
  locked[LockedOrNonBoneVG] -.->|no write| norm
  unsel[UnselectedVerts] -.->|no write| norm

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UI Location

• 3D Viewport > Weight Paint > Sidebar (N key) under the Edit tab (Weight Utility).

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Features & Usage

1. Ensure the mesh has an Armature Modifier (or an Armature parent).
2. Switch to Weight Paint mode.
3. Run Smooth Weight from the Sidebar.
   • If vertex selection is off, the first click turns it on and stops. Select vertices, then run again.
4. With vertices selected, run again to smooth and normalize.

Parameters

Parameter	Description
Factor	Blend amount toward neighbor averages each pass (0.0 to 1.0)
Iterations	Number of smoothing passes

Left unchanged

• Weights on unselected vertices
• Locked vertex groups
• Non-bone deform vertex groups