Paint Weights

Paint Tool

The Paint Tool allows you to interactively adjust weight assignments between bones and vertices by painting directly on the mesh surface. It behaves similarly to the standard 3ds Max Paint Tool, so most users will already be familiar with its workflow.

By default, painting over the mesh increases the weight of the affected vertices relative to the currently selected bones.

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Brush Controls

You can modify the behavior of the brush using the following key combinations:

• ALT
  Decreases weights instead of increasing them.

• SHIFT
  Smooths weight differences between vertices within the brush radius.
  Useful for creating clean transitions between adjacent vertices.

• CTRL + SHIFT
  Adjusts the brush radius interactively without opening the options dialog.

• ALT + SHIFT
  Adjusts the brush strength interactively without opening the options dialog.

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Controls

Paint

Activates or deactivates the interactive paint mode.

When enabled:

• A brush gizmo appears at the cursor
• You can directly paint weights onto the mesh
• Changes are applied relative to the currently selected bones

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Options

Opens the brush settings dialog, where you can adjust parameters such as size, strength, and falloff.

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Ignore Exclusions

Controls how excluded bone/vertex pairs are handled during painting:

• Enabled
  Excluded vertices remain unaffected by painting

• Disabled
  Painting can modify exclusion states:

  • Increasing weight → includes the vertex
  • Reducing weight to 0 → excludes the vertex

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Paint Quaternion Blend

In addition to weight painting, the paint tool can be used to adjust the blending between:

• Linear deformation
• Dual quaternion deformation

This allows you to fine-tune deformation behavior directly on the mesh surface.