With automatic weights blender проблемы не работает

Why is automatic weights missing from ctrl+p?

I tried it on a fresh project and there I was able to successfully apply automatic weights. Here if I try to do it with empty weights I can’t select bones in weight paint mode, so that’s not an option. I tried searching for answer but couldn’t find any. Any help is greatly appreciated 🙂

5 Answers 5

I noticed that when I select Armature it highlights all my bones and when I press ctrl + p it seems that the automatic weights is missing as well.

If you’re in Object Mode and you hit «a» to select everything, and then hit ctrl + p it shows the automatic weights in the context menu. Hope that helps 🙂

If it help anyone: I had the same issue but was unable to solve this issue. There was no «automatic weights» in ctrl+p menu nor was I able to assign weights in any other way. After an hour of pain, the issue was that my mesh was disabled for selection. So dont forget to uncheck this option 🙂

I had the same problem too. When I used Ctrl +mouse click (object data or vertex group) the automatic weight is missing, so the solution is to click on the rig then click the first object, then click the bottom object while holding shift and then when you click Ctrl + P it shows up. I hope that helps.

If you try to apply automatic weights to a curve or something like that be sure that you converted that to MESH with right click when object selected and convert to mesh option.

Try checking if your mesh is actually a mesh. I had this problem earlier when I tried to add an amature to a model. The problem was the model was made from curves, when I tried to set the parent with automatic weights the option was missing. When I converted the model to a mesh and did the same process, the option came up. Hope this helps lol

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Automatic weights problem

When I try to add bones to an object, and go to automatic weights, the body just falls down and the bones are still in the air then, where the body used to be before clicking with automatic weights. How can I fix this problem?

I have uploaded my file with that problem with eyes and teeth I guess, here blend file

1 Answer 1

Before you bind the mesh to the armature (parent With Automatic Weights) you need to apply the Rotation of the mesh. Your character was modeled lying on the floor and then rotated by 90° to get it up. When you bind it to the armature it’s reset to the original position on the floor. You need to apply the rotation to tell Blender that the standing pose is the new original position.

Select the mesh in Object mode, then use Ctrl + A > Apply All Transformations. This applies Scale, Rotation and Location.

To have everything nice and clean you can do this for the armature, too. Then parent them together.

If some loose parts of the mesh such as the eyes and teeth don’t follow the armature then the automatic weights didn’t work correctly. This happens often for loose parts. You need to assign them to the head bone manually as described in this question here: Tongue and teeth don’t follow the movement when I change the pose, any suggestins on how to fix this?

Update after inspecting the blend file

There are several problems.

The rig (armature object) is not ideal. Your model is 90 meters tall but all bones are tiny and aligned vertically. I don’t know how to fix this easily. The bones for the eye are overlapped by the upper and lower eyelids for example. It’s not very comfortable to use and I am not sure if automatic weights work well with these tiny wrong aligned bones. Maybe consider using Rigify to create a new rig?

There are two Armature modifiers. Remove the second one to fix the teeth and eyelashes.

Furthermore, the mesh is not aligned properly. You need to move it a bit to the left (←).

For the left eye (on the right side) the vertex group acts weird. Even if you use the Remove From All Groups button there are some verts of the right sleeve moving along. I’ve deleted the group, created a new vertex group with the same name, and assigned all vertices of the eye to the group. Then it worked.

The mesh has a lot of loose parts. Automatic weights don’t work very well with loose parts. If you parent the mesh to the armature (With Automatic Weights) you will notice that there are problems with the feet. And around the area of the belly/back, there is a hole when the character bends. This can be fixed with a remeshed duplicated dummy model that is used for the automatic weights. Then the weights are transferred back to the original model. This method is described here: heat weighting: failed to find solution for one or more bones or check this video.

If you’re new to rigging then it might be easier to start with Rigify or a model that is already rigged like the Rain or Vincent. Vincent uses BlenRig. If you want to try BlenRig 6 beta for your character model you can get it here.

I’ve done the automatic weights and transferred them, and fixed the eyes. It works except for the legs. It’s the bad rig with these tiny bones. It’s the dots on the screenshot. It’s not a custom shape but tiny sticks:

The mesh has not much geometry for the upper arms, and they bend not very well. The rig has no IK. That’s another disadvantage when you want to animate the character.

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Blender Automatic Weight Not Working

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Automatic Weights failing

I’m trying to rig a digitigrade model (which is already a challenge in itself), but I’ve hit an impasse where I try to generate Automatic Weights and it just fails, saying «Bone Heat Weighting: Failed to find a solution for one or more bones». How would I go about fixing this? I’ll attach my Blender file.

2 Answers 2

For this instance, selecting all the vertices and doing Mesh->Vertices->Remove Doubles will solve it.

In general, for automatic weight painting, your model must be very clean, with no duplicate verts for example, and not be rotated nor scaled.

Not always the case. However, try to eliminate double vertexes from the entire mesh before applying Automatic Weights. I hope this works for you.

Not the answer you’re looking for? Browse other questions tagged weight-painting or ask your own question.

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