When automatic weighting fails, repeatedly clicking the same command rarely produces useful information. Reduce the problem until you know whether the mesh, the binding selection or the intended deformation setup is responsible.
Preserve existing work first
Duplicate the file and identify any weights worth keeping. Confirm the mesh object, intended armature and parenting operation. A scene with several old rigs is easy to bind incorrectly; use clear names and temporarily hide unrelated objects.
Record whether the failure affects the entire character or one mesh piece. That distinction determines whether you should investigate the overall setup or a local geometry problem.
Isolate a small reproducible case
Try a copy of the body without accessories, then evaluate clothing and small parts separately. Inspect suspicious geometry, disconnected fragments and overlapping internal pieces. Repair deliberately rather than applying a destructive cleanup to the only copy.
If the simplified body binds successfully, reintroduce pieces in stages. If it still fails, compare the skeleton fit and mesh condition in that reduced scene. This process produces evidence that a whole-scene retry cannot.
Judge the successful bind by deformation
A completed automatic operation is a starting point, not a quality verdict. Run a crouch, shoulder raise and elbow bend. Inspect stray vertices and joint transitions before investing in animation.
Use manual assignment or weight transfer where it suits a specific part, and verify the result. Follow the weight-paint diagnostic guide when the operation succeeds but the character still deforms badly.
For the bigger picture, use our free Rigify migration workflow and three-engine import test plan.
Official references and scope
Sources checked October 18, 2026. Interface names and capabilities can change; use the documentation for your installed version. The workflow above is an editorial checklist, not a published hands-on benchmark.
