Lock Normals

Creates custom normals for a mesh if none exist. Can also be used to convert between "Free" and "Tangent Space" normals, see the Blender Docs.

Collapsing Meshes

Tangent Space normals make manual edits to geometry with custom normals much easier. Apply this modifier or use Add Custom Normals to achieve this.

Options

• Custom Normal Type: How to store custom normals:

  • Free: Store custom normals as simple vectors in the local space of the mesh. This is efficient and fast to evaluate but does not support deformation.
  • Tangent Space: Store normals in a deformation dependent custom transformation space. This method is slower, but can be better when subsequent operations change the mesh without handling normals specifically.

• Normal Domain: When Custom Normal Type is set to Free:

  • Face Corner. Store normals on face corners, allows for sharp edges.
  • Point. Store normals on points, cannot have sharp edges.