Bone Heat weighting: failed (due to none of the vertices in an island being visible to any bones) #45493
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Reference: blender/blender#45493
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Win 10 64. gtx 970
Blender 2.75a Hash
c27589e
Bone Heat weighting: failed to find solution for one or more bones
I attach the blend file and two prints..
Also the same broblems apper when i try to "assign automatic from bones" by individual bones in Weight Paint. Like one by one. Please see print2.
cat.blend
Changed status to: 'Open'
Added subscriber: @istoltoto
#103409 was marked as duplicate of this issue
blender/blender-addons#87888 was marked as duplicate of this issue
#90340 was marked as duplicate of this issue
#46296 was marked as duplicate of this issue
#51250 was marked as duplicate of this issue
Added subscribers: @LukasTonne, @Sergey, @ideasman42, @mont29
Not sure we’d consider that a bug, bone heating process is rather complex and not guaranteed to success afaik.
@LukasTonne, @Sergey, @ideasman42, maybe you know more about it?
Is very nasty to paint every bone.
Please consider to solve this problem.
Please?
Bone Hear weighting: failedto Bone Heat weighting: failedAdded subscriber: @brecht
A workaround is to split the mesh and then bind the weights. Enter editmode on the mesh,
L
linked select the body,P
to separate into a separate mesh, compute the weights for the two meshes separately, andCtrl + J
join them again.It seems there is some issue with the teeth where they are not visible to any bone, which is somehow messing things up.
I think the problem is that the algorithm does not explicitly handle connected components separately. They are all handled in a single matrix, and that's usually fine. But if none of the vertices in a connected component are visible to any bones, then the matrix will not be invertible, and the solve will fail for all components.
The solution would be to detect such cases, and then disable visibility tests for such components, or somehow get the weights from nearby components. Switching the code to use BMesh instead of Mesh would make that easier.
Wow, the guy who created Cycles is still with us.
The cycles is the main reason why i love Bender.
You are awesome Brecht Van Lommel !!
Added subscribers: @AlexanderKrause, @cessen
As I wrote at the other report, that got merged to this one now:
Auto weights was a guaranteed process with 2.70 for humanoid characters, but it doesn't work at all since 2.75. And that is only with specifically Rigify generated rigs.
Most Rigify Video Tutorials including payed once are even mostly based on that process to distribute weights.
It's not just some bones failing but all of them.
Added subscriber: @gregus
Hello,
I can't succeed in parenting a character to a rig with the "automatic weights" function. "Bone Heat Weighting: failed to find solution
for one or more bones" is always returned.
Character mesh seems okay, there are no separated parts and no non-manifolds vertex/edges.
Regards,
Gregus
System Information
win 7 SP1, GTX 670M
Blender Version
Broken: 2.78a and 2.78.4{F572514}
Right now "automatic weights" just leaves you with an error message.
Suggestions :
When the script has an issue in solving the assignation of a weightmap to a specific bone,it should leave this bone and jump to the next one so that the process can go on on the rest of the mesh which is correct.
Then, there can be an error message at the end of the process, but maybe 80-90 % of weightmaps are created and that's a big improvement.
The remaining "bad parts " can later be manually assigned.
the parts of the mesh with poly/vertex problems should be shown selected so that we know WHERE is the problem.AUTOMATIC WEIGHTS.blend
Added subscriber: @SpectreFirst
Huh, this is interesting. I have tested both cat.blend and automatic weights.blend and it seems that I was able to successfully use automatic weights by simply scaling models up about three times. For example, I can open automatic weights.blend, scale the model to its natural height of 1.65 m (2.5 scale), apply the scale, scale the Armature in Edit Mode to the same size (I used 3D Cursor as a base for scaling), Ctrl+P - Automatic Weight and after a while it successfully did what it supposed to. Cat.blend is harder to work with but if I scale the Armature about 3 times it seems to be working as well; there are still problems with very small details but weights were assigned without errors. All in all, it looks like there is a problem with small sizes and precision and scaling to bigger size worked for both cases.
You can also consider acquire this plug-in and use atop of blender automatic weight painting:
https://www.blendermarket.com/products/voxel-heat-diffuse-skinning
It saved me a lot of trouble.
Added subscriber: @Jeroen-Bakker
As mentioned the algorithm has flaws. Users find it a regression, so want to register this as a Known Issue.
Added subscriber: @pauanyu_blender
Bone Heat weighting: failedto Bone Heat weighting: failed (due to none of the vertices in an island being visible to any bones)Added subscribers: @shannonz, @lichtwerk
Added subscriber: @Sonship
Added subscribers: @JoseAntonioMolinero, @mod_moder
Added subscriber: @PratikPB2123
I remember some talk about a new bone heat skinning method and some example papers. Thing is, sadly not can't seem to find this thread anymore. It showed some examples and I believe it had a link to a new approach for bone skinning. Does any one perhaps remember reading or seeing that post?
@RomboutVersluijs perhaps best to get in contact with the (Animation & Rigging)[https://projects.blender.org/blender/blender/wiki/Module:%20Animation%20&%20Rigging] module.
@Jeroen-Bakker
Thanks for the heads-up. I'll try to do more searches for it