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Questions tagged [bones]

Bones are the individual sections of an armature that are used to deform the mesh. Bones act like other objects (they have properties and can have constraints) but are invisible in the render.

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1k views

How does blender calculate poseBone.matrix?

How does blender calculate a poseBone.matrix through the hierarchy chain? A bone's final matrix is a transformation matrix which defines the bone in armature-space in the current pose (M1). I want to ...
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194 views

Blender bone.matrix API changes from v249 to v277

I've been using an old script for a long time to import a custom format which contains a 4x4 matrix for the bone transform (inverted) and 4x3 for the bone animation (3x3 rotation matrix + 1 location ...
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0answers
283 views

Can't flip pose properly blender

Pose reverse fails, tried to rename some bones to check if there's a problem but it didn't change anything. Here's a gif:
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0answers
987 views

How to parent a bone to an empty?

I've got a Problem, because I'm trying to create this (Rigging an umbrella-like object) -but I just can't figur out how to parent the bone to the empty. Can someone help me with this?
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0answers
41 views

Limit Rotation for bones

I am trying to learn the proper way to use limit rotations for bones in my character. I have a good mesh and I have the bones inside but I cant seem to get the limits right. Please help me
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0answers
64 views

Create custom bone shapes from vertex groups

I have an armature parented to a mesh. The mesh is constructed from a set of cuboids which I created around each bone, where each bone controls only the vertex group around it, and these cuboids ...
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49 views

What are bone matrices?

I tried looking everywhere but everything I've found so far seems to assume that I already know what it is. Thanks!
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0answers
116 views

Why are my custom wire bone shapes' lines thicker when in Pose Mode?

The wire bones on the right are thicker than they should be. In my other blend files the custom wire bones are like the left picture when in pose mode. I have tried almost every setting that I can ...
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0answers
134 views

How to get rotational difference to work correctly?

I am following this book on animation, and I cannot understand this particular part. You are supposed to create a corrective shape key, to make the character's belt look good when the leg is posed ...
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0answers
40 views

Bones are unresponsive after closing and reopening file

I was doing this perfectly well, but when i saved and opened it, the bones do not work well for some reason. I probably skipped something. I just followed this tutorial and the end result when i saved ...
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0answers
556 views

parent an object to a bone in python

I'm trying to parent an object to a bone in python without using operator So I did this : ...
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0answers
34 views

Motion capture movement from 3d model animation

I have a set of animations of a model with a complex rig that I would like to copy to another model that is unrigged.The original model has more than 250 bones in total and it would take a really long ...
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0answers
447 views

Merge two armatures into one

I want to merge two similar armatures, that have same named bones in them And when I merge armatures with Ctrl+J, bones don't merge, the same named bones were like that: "head" and "head.001", "head....
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234 views

Controlling robot servo arm (in real-time) via 3d model in blender

I am trying to create and control a robot arm (made of servos) via it's 3D model. I am big fan of Justin Dailey's work -- he was one of the first few people to accomplish this but his 7 year old ...
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0answers
78 views

How to make backpack parented to bone to be detachable with good weight paint for straps?

I have one backpack object paranted to armature like this (it needs to be detachable to be able to fall down, etc) with Child Of constraint to follow the chest bone of the character: But that creates ...
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0answers
267 views

For VRChat specifically. I have the head from one model and the body from another. Character is floating in unity when scene is played

I used the body from one model and the head from another. I manually placed them together as well as I could and it looks fine. I kept the bones for the respective models, deleted the ones I didn't ...
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0answers
144 views

How to move root bone non-independently of others

Here is my model right now; there is a root bone at the center and 4 'arms' spanning a circular mesh: When I use the G hotkey (in pose mode) and move it up the Z axis, all of the bones move equally ...
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0answers
55 views

Can't get armatures to work with loop cuts on mesh

I want to make the armatures on my mesh to bend the arms at their loop cuts, but when I do, even though the bone joints are in exact same place as the loop cuts, it moves the arms as so: Here's the ...
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0answers
30 views

What does the use_local_location mean for bones

To test this, I run a test to show the difference of use local location or not. C.object.data.bones['upperArm.R'].use_local_location = False C.object.data.bones['upperArm.R']....
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0answers
102 views

Unable to export animated model in MD5 format

I am trying to export this animated model(It has 6 planes which fold to become a cube). I am getting the error on "Plane.004" saying ...
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0answers
90 views

My blender animation is wrong in unity3d

I'm trying to make a paper plane animation controlled by bones.Everything is OK when I play the animation in blender's timeline.But when I export it to unity3d, animations are going wrong. I don't ...
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0answers
102 views

Copy keyframe from action to another while changing bones

I just started using python with Blender, and I'm trying to do something specific. I have a skeleton with a few bones (Say bone1, bone2, bone3) and an action with a few keyframes (kf1, kf2, kf3). ...
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0answers
400 views

Armature Root Bone in FBX Export

I've seen several posts on this topic, but I fear they are old and forgotten, so I decided to post a new one. I've been working around the armature being exported as the exterior-most bone in FBX ...
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0answers
231 views

How to add multiple duplicate-linked legs to a single armature?

I want to make a quadruped insect robot. Each leg will be exactly the same. They will have three regular bones and an Inverse Kinematics bone at the end. I want to connect them to a single body/spine ...
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0answers
163 views

Is there a way to use 6DOF for spring in blender physics?

I wanted to make a bone with an angular spring for animation, But it seems there's only a spring joint constraint for length not rotation. (Generic Spring) But I found 6DOF for spring in game engine, ...
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0answers
66 views

A quick way to know the names of the relationships there are between bones without trying to guess

I spent a lot of time building up the armature of Piero (I'm following the Piero training course by CG Cookie) and then, after I was all done and started to refine ...
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0answers
48 views

Is there a way to make an attribute unkeyable?

Can i make an attribute of a bone not keyable?, it makes me nuts that blender keyframes attributes that are supposed to be locked and makes my graph editor have way more curves than what i should be ...
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0answers
353 views

What's the correct way to import animations with node bones

I am coding a Blender Ogre importer for Ogre 1.10. I want to import the animations from the .skeleton but ogre and Blender bones are different: Ogre: A bone is a Node Have an offset from parent (...
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0answers
296 views

creating a disolvable ik rig in blender for unity3D mecanim

I am currently working on a game where I want to be able to add animations quickly and tweak them easily, yet have the rig itself play nicely with the unity3D engine. So basically all the features of ...
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0answers
32 views

Its there a way to connect some bones when the are in different armatures?

I have a model which has some parts like the hair and the body separate, and I even have some different bones that are connected to each object separately. Now I need a way to connect them while the ...
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0answers
138 views

Unapplied curve modifier not applying after export?

This is my conveyor belt in game. its actually translating instead of rotating around the middle in a chainlike fashion, which it is doing in blender. I did this by moving the bone, and it rotates the ...
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0answers
688 views

Bone parents to the wrong end

I am trying to parent the top of a bone to the bottom of another bone (see image) but when parenting it will parent to the wrong end, I have tried but was unable to find a way to set it to the other ...
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0answers
1k views

How to Move Bone Joints in Pose Mode like in Edit Mode? (without scaling)

I wonder how to move bones in pose mode like as you would grab the tips in edit mode and move them but without scaling the bone. Tried to set this up with damped track or ik rig. At both the target ...
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0answers
657 views

Bad bone rotation in Unity humanoid

It looks that I can not export roll setting from Blender to Unity, because it still has bad rotation. I tried different axis, different roll, blend file, fbx file. Nothing is working. It is working ...
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0answers
116 views

Change Bone/Arm length on a rigged model

I've recently downloaded a rigged 3D model but the character's arms are too long. How do I change the size of the arm/bones?
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0answers
211 views

Distorting a 2D image with a rig?

I have a 2D image broken up into separate layers (upper arm,forearm,hand etc.), and have positioned the bones. When I test them in Pose Mode several things go wrong. As I rotate some limbs get fatter,...
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0answers
406 views

How to get the location of head bone relative to parent's head bone

In my python script I want to get the location of the head of the bone, in the parent's local matrix. This means that the equation: ...
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0answers
1k views

most simple way to drive shape keys in python via armature object

I'll explain the steps to reproduce the most simple example to allow to update a shape key value from python within the game engine. This is supposedly only possible through an armature object. start ...
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0answers
28 views

Shape key and driver Problems Blender 2.8

I'm rigging a character and I would like to fix spots that weight painting won't fix with shape keys. But assigning bone as a driver doesn't do anything. It's controlled by an IK bone and doesn't seem ...
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0answers
40 views

CMU bvh animations and rigging

I am wondering if i could get some tips from the wonderful people of this group. Does anybody have any experience working with CMU Mocap animation? I am currently working with bvh files. I have a rig ...
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0answers
12 views

Duplicated vertex groups in separate object don't deform like the originals

I made a character in MakeHuman and imported it into blender using the MHX2 import script. Quite impressive! I am trying to model a pair of trousers, but for some reason I can't get them to move (...
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0answers
17 views

can we select only modified bones from a pose in the library?

When applying a pose from the library, I have to: 1 - spend some time to grant there is no bones already selected 1.1 - but I usually hit 'A' until it selects all and then hit 'A' again to deselect ...
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0answers
14 views

Blender armature deform with automatic weight

I'm trying to set armature to human body object. But I have a problem, can't apply armature deform with automatic weight. I was removed doubles, but any time has this problem. how solve this problem.
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0answers
56 views

Keyframe interpolation results in bouncy feet

I made a very basic test model (Programmer by trade, not artist), I wrote an exporter to export the model, armature and keyframes. Everything was going pretty well until I noticed that the feet of my ...
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0answers
49 views

Transfer animation between two armatures that have the same structure and naming conventions but differing rest poses?

I have a skinned armature in a T-pose as its rest pose that is not animated and a second separate armature that has an animation I would like to transfer to the first skinned mesh. The only problem is ...
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0answers
200 views

How to open closed eyelids on pre made models

I'm "kind of" new to Blender and rigging/animation in general, but I like to jump out in the deep part of the pool. (Sorry) What I mainly want to do is rigging and animation, so I've kind of not paid ...
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0answers
24 views

Blender Motion creation

Is it possible for math function to be created in python, that could be used in the designing of animation? For example using sin or cosine for the motion of the bones . Is this what most animators ...
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0answers
24 views

What is a bone on most basic level

Is a bone basically just a modified empty object, consisting of two points? How would you define it? Edit: I'm not talking about its extended list of functionality, but just how the object itself is ...
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0answers
32 views

Problem Mesh Renderer in Unity

I have a simple Object and one armature (1 bones). In Unity, object have a Mesh renderer like this : WIth a Ctrl/P, I set the object's parenting to armature In Unity, a black zone appears and a ...
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0answers
56 views

How to apply axis conversion to quaternion keyframes

I'm trying to write an exporter for Blender, but i can't wrap my head around how to get the rotations straight. In the format I'm trying to export to, the initial orientation is always neutral ...