Bone Heat Weighting Failed - Automatic Weights Doesn't Work in Blender

Learn how to troubleshoot and resolve the common "Bone Heat Weighting: failed to find a solution for one or more bones" error in Blender when using Automatic Weights. Explore five effective solutions, including merging vertices by distance, scaling the object, splitting by loose parts, and using weight transfer techniques. Discover free and paid add-ons like Surface Heat Diffuse Skinning and Voxel Heat Diffuse Skinning to enhance your rigging workflow. Master efficient weight painting methods to overcome complex mesh and armature binding challenges in this comprehensive 19-minute tutorial.

Bone Heat Weighting Failed / Automatic Weights doesn't work
Solution 1: Merge by Distance
Solution 2: Object Scale x100
Solution 3: Split by Loose Parts
Another Example
Free addon: Surface Heat Diffuse Skinning
Paid addon; Voxel Heat Diffuse Skinning
Solution 4: Weights Trasfer Technique
Solution 5: Efficient Weight Painting