Questions tagged [inverse-kinematics]

For questions about using IK in rigging. Inverse Kinematics is the opposite of the default Forward Kinematics. Instead of posing each bone in a chain from the base to the tip, IK solves the rotations of preceding bone(s) in the chain automatically based on the position of the IK-constrained bone.

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38 views

Animating tentacles

I'm doing some tests for a character for a videogame I'm making. The body is straight from MakeHumans, I imported it with the rig because it would save me the pain of rigging the character myself (...
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375 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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883 views

How to export animated character from Blender 2.8 as fbx to Unity?

I have a fully rigged and animated character with shape keys. I created it in 2.79, exported it using ASCII with the settings below and could use it in Unity without any problems. However, after ...
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30 views

Which algorithm does Blender use for Inverse Kinematics?

Is there any documentation how the Inverse Kinematics Bone Constraint is implemented? I assume the problem is written in some kind of minimizing problem and ...
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192 views

Converting FK animations to IK

I have already created a few animations (idle, run...) for a character that I rigged using FK, because I didn't know about IK at the time (I'm very new to animation). However I recently learnt about ...
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2answers
88 views

I can't understand Inverse Kinematics

So I am relatively new to Blender, and while figuring out the process that is rigging, and applying Inverse Kinematics to my armature, I came into contact with a weird problem, Normally, inverse ...
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56 views

Make Pole Targets follow the bone

Im trying to rig a Humanoid in blender, and I have the Iks done with their Pole Targets. My problem its that I dont know what its the best option to make them follow their bone position. I have tried ...
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1answer
209 views

Problems with IK Rigging and Ragdolls

I'm currently working on a game that uses an AI system that heavily depends on having humanoid rigs (and ragdoll physics), and I have a modeler/animator who made this character for the game that looks ...
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1answer
553 views

Inverse Kinematics constraint with pole target

Salutations, I am currently trying to make a rig for a project involving 2D planes to create some kind of equivalent of DragonBones in Blender (I'm working on Linux and DragonBones isn't available ...
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41 views

Switchable behaviour for knee bending in IK setup

Making a knee bend in a desired way in IK setup, is as simple as just changing that bend in edit mode. But what if I want the knee to be able to bend both ways, depending on situation. A switchable ...
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1answer
47 views

Align orientation in Pose Mode

I'm trying to do a simple manipulation that I'm doing every day at work as a professionnal animator. My experiance is with Motion Builder and 3dxMax, but I'm learning Blender on spare time. I just ...
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0answers
540 views

About local space in action constraint

As you can see the picture below, if you change the rotation value by rotating the parent object (box), the rotation value of the child object (monkey) is retained. Child objects have their own local ...
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150 views

Object doesn't get motion blur in several frames

I made a robot animation with IK rig. After rendering, as you can see on image 2 & 4, the robot didn't get motion blur at all but the furniture still get the motion blur. image 1 & 3 works ...
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48 views

Inverse Kinematics Armature Rotation

When trying to learn how to animate characters today I wanted to accomplish learning Inverse Kinematics. Watched a couple tutorials on youtube, seems pretty straight forward. When I apply the target ...
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1k views

Creating a generic IK/FK snap script

I've tried deconstructing the Rigify addon to isolate the script part that handles IK/FK snapping, but so far I've had no luck. Rigify is a very nice tool, but I'd like to get the snap functionality ...
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158 views

Torus animation rig

I am trying to deal with Blender's IK solving system (though maybe I don't need it at all?). I need to animate torus into a smile-like figure (upside- and downside-"smile" animation will be for the ...
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259 views

Get bone rotation from IK

Is it possible to get the xyz euler rotation of the bones in an armature that is controlled by the iTaSC IK solver with python? With the rotation I mean the difference e.g. between the start and end ...
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97 views

Inverse kinematics offset?

I have a problem with my rig. As I put a IK constrain on the two bones, the constrained one is just offsetting as shown in the screenshot below Is there anything I did wrong? Best regards
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295 views

What are IK bones, and what do they do?

I've been following this tutorial series, and he uses IK bones and the other types of bones that I've forgotten the name of (edit: since remembered, 'pole target'), a controlling bone under the foot ...
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1answer
94 views

Inverse Kinematics to rig a Truck with a Trailer

I'm trying to animate a truck with a trailer on it can follow a path realistically. I know I should be rigging the model using inverse kinematics but I can't get it to work. I found a previous post ...
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16 views

Robot animation, joint angles and cloth cover

I'm new to Blender 2.8 and need help creating a cover for a robot arm. I've been working with tutorials but would like to hear about better practices or better approaches to create my animation. What ...
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0answers
14 views

Python API: How to export bone angles in real-time?

Attached is a screenshot of a simple IK armature. Is there a way to export the bone rotations (in radians or degrees) into the terminal window (as a plaintext) in real time? As in: "When I move the ...
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22 views

My IK rig won't flip properly

i'm having problems with my IK rig. I'm working on a generic character model rig with multiple animations. One of these animations is a walk cycle and a practice that a lot of people implement is the ...
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1answer
41 views

Force IK rig to bend knee “Wrong” way?

I've designed this mech's legs so they can fold up when crouched but that left the knee pivot behind the top one so my IK rig bends my leg the wrong way. Can I have my knee behind the "pelvis" and ...
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0answers
8 views

IK Foot moving after enabling rotation

I'm trying to give my rig an IK for the foot, but whenever I enable the rotation tickbox on the IK bone options, the foot snaps to a complete different place. Is there anyway to prevent the foot ...
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0answers
19 views

Model breaks when animating

I use blender 2.8 and animated using armature, bones and inverse-kinnematics and applied auto weigths. I Followed these tutorials to do it: Youtube tutorial by Royal Skies LLC The armature animation ...
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22 views

Does the iTaSC IK Solver Turn off the FK Rig?

i put some iTaSC IK constraints on my rig, and have been using them to animate. however, i turned the IK constraints OFF to pose the fk rig... and my fk bones will NOT move. is this a side effect of ...
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20 views

Bone chain with IK bends uncontrllably/randomly when I move it's helper bone

I'm trying to follow this yt tutorial on inverse kinematics https://www.youtube.com/watch?v=Pt3-mHBCoQk ...but I can't seem to be able to move the bones in a single plane like in the video, my rig ...
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20 views

2.79 FK to IK Rig and Drivers, Why are they Conflicting?

blender 2.79 i'm not real versed in this, but i was following this tutorial: https://www.youtube.com/watch?v=r-G3ocQ5cjg basically, the pose bones follow the ik chain bones when the ik switch is on. ...
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8 views

Auto Key does not Key limbs that are moved with FK_IK Snapping Rigify

I am using a rigify rig. I have auto key on. After creating an animation using IK, I want to snap the FK limbs to the animated IK limbs. Auto Key does not record the new position of FK limbs once they ...
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0answers
21 views

Mesh partially wrinkling when armature moves

I'm new to Blender and am having an issue with some joints wrinkling when moving the armature. In the attached image the left knee is exhibiting this problem, while the right knee is bending as I want ...
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1answer
26 views

IK Flexible Bones Twisting Mesh

I created a tentacle, added an armature, changed the bones to b bones, added ik, target null object and noticed that the bones looked twisted (without me doing anything). Once I started posing my ...
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22 views

How do I reset pose with IK?

I can't seem to find any answers on this as everything pose reset question I found is ALT+R/S/G. I've rigged a leg with IK using the basic methods with a pull target and control bone. But now I can ...
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1answer
13 views

I made an IK foot bone and it moves the entire body while bending the foot. Anyone have any idea's why this is happening?

Here's the file if anyone needs it so they can help figure out the problem, thanks.
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17 views

Does anyone know why my bone name won't show up in the bone tab for the target when doing constraints?

I'm trying to make an IK bone, but it won't show up in the constraints tab, I press the target and go to the armature, then I press the bone tab and the name won't show up, does that for the rest of ...
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38 views

Offset Bone Rotation and Inverse Kinematics Wheel Steering (Rigging Setup)

I am trying to rig an armature with 2 links and a wheel. The wheel can rotate. The two links need to help lift the wheel (1 DOF) and steer the wheel (1 DOF). I followed a rigging tutorial online and ...
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31 views

Keyframe non IK bones

I've created a somewhat working IK rig for a video game character that I would want to animate for use in the game through modding. My issue is that when I move my IK bones and set a key frame for ...
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80 views

RIGGING - How to make a “correct” arm twist

I try to make a 100% custom rig system based on stretching bones, and I kind of manage to do everything correctly, BUT, and that's a problem I've met for years on Blender, I can't find a way to make a ...
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16 views

How do i fix this IK

Basically, I can't rotate the thigh higher than this point with IK, or when I try to rotate it separately. If I remove the IK, then I can rotate it how ever much I like
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17 views

rigging & IKs : should one parent Pole Targets to Targets?

I'm learning rigging, and I have got a "philosophical" question here... I was wondering if, when using IKs, people do usually parent Pole Targets to Targets ? From what I understood, a Pole Target ...
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11 views

Knee vertices not following Foot IK. Seem locked in place

I'm trying to make the knee and hip joints respond to the footIK but the knee vertices seem stuck in place. Probably an easy problem, but I'm new to blender. Any help much appreciated!!! Thank you
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18 views

How to I bake IK targets into an animation?

I'm new to Blender, I have a rigged character in Blender. He is riding a ATV(quad). His hand bones have IK constraints with targets (empties) positioned at each handlebar. Everything is working as ...
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1answer
83 views

Exporting IK bones from blender2.8 to unity has problem

I'm working blender2.8 with unity3d but when I export my model from blender to unity My Bone plays animation so weird see this First picture in on unity. second one is on blender2.8 Two legs have ...
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20 views

How to force IK chain bend direction?

So, after tons of misadventures in the world of Blender I decided to rig my first model. So far I made good progress, the base armature works quite well and I started to do some IK rig stuff. Legs/...
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2answers
30 views

Parenting armature to mesh with automatic weights

I'm just beginning in the animation world and I've been studying Blender – so far it's been good but now I've got a snag. Whenever I parent my mesh to a certain armature or bone on the right side of ...
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57 views

Deform bone will not follow IK bone perfectly with copy rotation

I am trying to separate bone layers with ik fk central and deform layers. I am having problem with copy rotation from IK>central>def bones (each in different layers.) The deform bone will not follow ...
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39 views

How to Rig This

I have this Bone Rig that I don't know how to rig. Think of it like a dog ear. Here's a picture. I'm trying to figure out how to rig it so that the bones on the right side are the control bones. ...
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1answer
410 views

Automatic Forearm twist?

I'm trying to setup a rig that allows IK/FK (via influence property), where the forearm twist joint automatically alleviates part of the twist of the hand. Not necessarily as part of the IK - just ...
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1answer
49 views

Using Inverse Kinematics and/or Pole Targets to move hair bones in unison?

I have a model whose hair is composed of several strands that I have each connected to a bone as part of the whole armature. What I want is for each "hair bone" to rotate at the tail in correspondence ...
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0answers
32 views

Having trouble Parenting a Bezier curve

So I am working on a mesh of a character with a tail. I used a Bezier curve to IK that but I'm having trouble. Everything is fine until I try to parent the curve to the armature in some what either ...