Smooth Weights is a weight painting add-on that simplifies the character skinning workflow. It offers multiple smoothing methods, including Surface smoothing, which averages weights across neighboring vertices, and Volume smoothing, which evaluates proximity regardless of topological connection. The tool includes features like weight locking, vertex group limiting, and the ability to preserve mesh shell boundaries during deformation.

The add-on integrates directly into Blender's workflow with a built-in selection mode that operates in pose without switching to Edit Mode. It supports both position-based and topological symmetry, allowing for real-time mirroring of weights and vertex group assignments. Users can apply smoothing globally using the Flood feature or restrict it to selected areas.