Edit Deformers > Blend Shape > Bake Topology To Targets

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With Bake Topology to targets, you can regenerate or update your blend shape deformations so that any topological changes made to your blend shape base shapes are also applied to their target shapes. Bake Topology to Targets is useful when you have to make topological changes to your base shapes after the blend shape is created.

Note

Bake Topology to Targets produces the best results with polygonal geometry.
The Paint Blend Shape Weights Tool supports custom normals and UVs.

Topology propagation limitations

Bake Topology to Targets may cause vertex swapping in instances of dense topological data where many vertices are close together. For example, vertex swapping may occur at your model’s closed mouth. To prevent vertex swapping in this instance, open your model’s mouth before using Bake Topology to Targets.
Bake Topology to Targets may produce undesirable results when performed on selected subsets.
Bake Topology to Targets works with NURBS geometry, but the resulting target shape deformations may not look exactly like those of the base shape.