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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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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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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1answer
387 views

Is there a way to only store keyframes of only selected bones in poseLib?

What bones does "Add New Pose" operator store in Pose Library ? I am animating with "Blenrig" Character Vincent and it has lots and lots of bones. When I try to store poses it creates keyframes for ...
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1answer
299 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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2answers
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How to make a bone NOT inherit location from parent? Or how to position bone at world location?

Lets say I have two bones, A "Root" bone and a "Child" bone, the "Child" bone has the "Root" bone set as its parent. How can I make it keep its world position while the parent moves? Now, the reason ...
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1answer
416 views

Armature: automatic weights not working correctly

I've rigged a few models and automatic weights always worked pretty good, compared to what's happening to me now. Vertices assignment is all over the place and I don't know why. This happened only on ...
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1k 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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135 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 ...
3
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1answer
158 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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1answer
259 views

How to achieve accurate rotation of fingers at the point they meet the palm?

I have problems with fingers in general but this is the hardest part for me. It looks ok at this point: But if I rotate at the base of the finger, problems start: This is because the rotation ...
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2answers
1k views

Armature with automatic weights problem. Object not following the bone properly

I tried to parent bones with automatic weights and 1 part of my model is working properly(the green one), while other is kinda "broken"(the red one) when I try to move bones. I don't know if that's ...
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588 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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38 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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603 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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275 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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106 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 ...
2
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1answer
353 views

Trying to add muscle to a 3d skeleton model

I have a 3d model of a atlasaurus that I imported to blender as a .obj file and it comes up, but I do not know how to add muscle to the existing static skeleton. I have searched online and all of the ...
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284 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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398 views

Exporting bendy bones/shape key animations?

How can I export these animations into another program? I don't need the rig itself in these other programs, I just need the mesh's animations to be exported, if that makes sense. Is this possible, ...
2
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1answer
266 views

Python API: Transformation from `Bone` bind pose to `PoseBone` using SQT

I am trying to understand the Blender Python API, more specifically Bone and PoseBone types and how they fit in with skeletal ...
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1answer
3k views

How to put all armature bones under 1 root bone

i have downloaded many arm rigs for my first person project in UE4. UE4 only allows for one root bone when importing. All of the arm rigs i have downloaded have many bones, rather than being children ...
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182 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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63 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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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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2answers
293 views

Mesh distorted when armature bone rotates

My character's arm starts to get suck when rotated on x axis. I tried weight paint and it does not seem to help much I'm really new to Blender and 3D animation and any critique is appreciated.
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Armature transform matrix

I have a question about how to place bones in a right position. Let's say I have 3 bones root, mid, and last. And root is a parent of mid, mid is a parent of last, and last is the very end. As I know ...
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109 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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109 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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433 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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44 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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255 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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65 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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172 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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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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1answer
469 views

Rigify vertex groups mesh deform error

So I imported a model into Blender that already has vertex groups and a skeleton. I then imported a metarig and made it the exact same shape as the imported skeleton. I applied the armature modifier ...
2
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1answer
618 views

How do I set the bone length after setting a new bone matrix?

In version 2.77a; the docs show that the edit_bone.matrix is no longer read only, but a note warns "does not include bone length". Luckily, ...
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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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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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57 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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386 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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305 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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1answer
270 views

When in weight paint, armature is outlined in red rather than selecting a bone?

Why is it that, when I open a rig that has the limbs separate and the bones don't move the mesh yet, I select the armature and go to pose mode, then open the rig of the body in weight paint mode and ...
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35 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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139 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
750 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
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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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683 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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119 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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221 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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423 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: ...