Bone Heat Weighting: failed... error hapens or not, depending on the character size or number of polygons, #103409

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Jose Antonio Molinero · 2022-12-22T16:49:30+01:00

2022-12-22 16:49:30 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94

Blender Version
Broken: version: 3.4.0, branch: blender-v3.4-release, commit date: 2022-12-06 18:46, hash: a95bf1ac01
Worked: (newest version of Blender that worked as expected)

Short description of error
If I parent a 3d model to a rigify metarig (or rig), I have a chance of getting the error or not, depending of the character's size, and number of polygons. Same character with diferent polygons, or size, will parent ok or will show the error:
'Bone heat weighting: failed to find a solution for one or more bones'.
depending on settings.

Exact steps for others to reproduce the error
In the Blend File I provide:
Select Blenderella's 3d Mesh, press shift, select the metarig. Right Click>Parent with automatic weights.
You can observe the parenting happens ok. Blenderella has 15k poligons.

Undo the parenting.
Go to the modifiers tab. Apply 1 subdivision. Blenderella now will have around 45k polygons.
Parent again with automatic weights. The error will appear.

Undo the parenting.

Scale both, 3d model and the metarig, x10. Apply location, rotation and scale to both.
Parent again with automatic weighs. The operation is done ok again.

This happens to me with all the characters I rig with rigify. I have to scale it x10 in order to work. Then scale it down when in the 3d scene. It's annoying. It has happened since 2.78 or before. I hope a solution can be found. Thank you.

I know this error can happen in other circumstances, and has been discused. But since this happens or not, to the exact same character with the exact same rig, depending on its size, I think that this is a different variation that has not been discussed or maybe you are not aware of this. Please forgive me if not.

Bella_bodycanon_RIG_ok.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94 **Blender Version** Broken: version: 3.4.0, branch: blender-v3.4-release, commit date: 2022-12-06 18:46, hash: `a95bf1ac01` Worked: (newest version of Blender that worked as expected) **Short description of error** If I parent a 3d model to a rigify metarig (or rig), I have a chance of getting the error or not, depending of the character's size, and number of polygons. Same character with diferent polygons, or size, will parent ok or will show the error: 'Bone heat weighting: failed to find a solution for one or more bones'. depending on settings. **Exact steps for others to reproduce the error** In the Blend File I provide: Select Blenderella's 3d Mesh, press shift, select the metarig. Right Click>Parent with automatic weights. You can observe the parenting happens ok. Blenderella has 15k poligons. Undo the parenting. Go to the modifiers tab. Apply 1 subdivision. Blenderella now will have around 45k polygons. Parent again with automatic weights. The error will appear. Undo the parenting. Scale both, 3d model and the metarig, x10. Apply location, rotation and scale to both. Parent again with automatic weighs. The operation is done ok again. This happens to me with all the characters I rig with rigify. I have to scale it x10 in order to work. Then scale it down when in the 3d scene. It's annoying. It has happened since 2.78 or before. I hope a solution can be found. Thank you. I know this error can happen in other circumstances, and has been discused. But since this happens or not, to the exact same character with the exact same rig, depending on its size, I think that this is a different variation that has not been discussed or maybe you are not aware of this. Please forgive me if not. [Bella_bodycanon_RIG_ok.blend](https://archive.blender.org/developer/F14083718/Bella_bodycanon_RIG_ok.blend)

Jose Antonio Molinero commented

2022-12-22 16:49:30 +01:00

Added subscriber: @JoseAntonioMolinero