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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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Rigging a mechanical plunger: bone constraints lead to offset results

I have a model for a soccer robot which has a "leg" that can be used to shoot a ball. It is capable of shooting from a low and high position, allowing the ball to be shot through the air or ...
Imetysaw's user avatar
1 vote
1 answer
1k views

How do you rotate an entire rig without bending bones controlled by IK pole?

I'm trying to take my entire rig by the root bone and rotate it while preserving all of its other bones' positions/sizes/rotations. It all works, except for the arms which start bending all over the ...
Samuel Stewart's user avatar
0 votes
0 answers
27 views

Guidance requested for automating ik control bone movement and addition to poselib

I am attempting to automate the creation of an array of poses (as a poselib) for a mechanical system in Python, based on known scene geometry. I have a rigged armature that works well having ...
Charlie Peppler's user avatar
0 votes
1 answer
1k views

How do I convert this FK leg to IK without getting rid of animation

I have this character here that has motion capture on him but I want the legs to be put into IK instead of using FK without getting rid of the motion capture I got from Mixamo. I've tried "baking&...
Mr Calamari's user avatar
2 votes
1 answer
520 views

Inverse kinematics acting weird

I added a rig with both forward and inverse kinematics but whenever I move the right hand then for some reason the left arm moves in a weird way, same withe the feet. I have already checked and every ...
Jamie Gosling's user avatar
0 votes
2 answers
485 views

Armature bone rotation values not changing when using inverse kinematics

I'm trying to have drivers activate based on certain bone rotation values. However when the bones are moved as a result of the IK setup their rotation values do not change at all. Edit: File ...
Ralthkon's user avatar
0 votes
1 answer
516 views

IK constraint not working

This is the robot rig that I am working on. I duplicated the left leg to make an FK IK switch. But the IK is not working on the "Third leg part L.002". I tried to move the IK control bone, ...
Wither Creeper's user avatar
-1 votes
2 answers
175 views

Sequence of Bones rotate One by One - Controlled by One Bone

I want to create an armature that has several bones that are all controlled by one bone. When that one bone is rotated, it will rotate all of the bones, but one at a time. So when one bone has ...
RBlong2us's user avatar
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1 answer
84 views

Armature IK Causing Heavy Distortion

I've been trying to figure what's wrong with what I'm doing for a long time now. The IK moves how I want it to, but...you can see what happens with the attached image. .blend file: file
Matthew Lee's user avatar
0 votes
0 answers
190 views

Mesh Crumples at Elbow When Arm is Rotated

When I rotate my characters arm so that both the upper and lower arm are facing down, the mesh at the arm moves around like it is crumpled. I do not believe this is a problem with the weight paint, ...
RBlong2us's user avatar
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1 vote
1 answer
619 views

Clearing Transforms Doesn't Make Rest Pose (IK problem?)

I have a problem where my pose position and my Rest Pose position are not the same, even when I have cleared all transforms for the pose position. It has something to do with the IK bones - perhaps ...
RBlong2us's user avatar
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1 vote
1 answer
504 views

Base Mesh changes back to its original form after switching to object mode

I downloaded the free RoyalSkies Male Rig from his website just to play around. I made the character less buffed up with proportional editing but it reverts back to its original form after switching ...
enentee's user avatar
  • 23
1 vote
1 answer
1k views

How do I link multiple meshes to one armature and apply Inverse Kinematics without distorting mesh?

I’m trying to to rig and animate a set of meshes that are 3d scans of a horse’s leg bones. Each bone is a separate mesh. I only need the bones to rotate on one axis (y-axis in the screenshot) and move ...
Maia's user avatar
  • 13
1 vote
1 answer
57 views

Problem with armature with automatic weight

I am relatively new to blender and was following this YT tutorial, everything was going well and my IK were working on the bones, but, when I tried to parent the bones to the mesh everything went ...
Diogo Centeno's user avatar
1 vote
0 answers
583 views

Accessing Inverse Kinematics from python

I searched a lot about blender's Inverse Kinematics API, but I'm really confused right now. So the goal of my project is to control a robot arm that has 4 degrees of freedom. So far, I managed to ...
charles monod-broca's user avatar
1 vote
0 answers
53 views

IK/Spline IK Armature Controllers binding to respective bone

I've created a rig with IK Controllers for the hands/feet and a Spline IK system for the tail, both of which work rather well for my purposes. However, I want to improve their functionality by ...
Jon's user avatar
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0 votes
1 answer
137 views

IK rigging with a hammer held in hand

I'm having trouble getting an IK rig to work how I want it to. My goal is to have a hammer in my characters arm that I can move and rotate have the arm and hand rotate properly like it would for a ...
mberna's user avatar
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0 answers
240 views

How to keep the end bone of the rig straight? What would be the right way to do it?

I have this rig that I made. I was thinking that I could use some kind of IK system to make it easier to animate. But I have a problem with it. Either I'm not creating a proper IK system, or there is ...
Yogev's user avatar
  • 105
0 votes
0 answers
75 views

Having trouble with the space settings on copy location bone constraint

So I used to know how to set up the copy location constraint so the bone using it would move when the target moved relative to its own location, but could still move in t's own space. Now I'm trying ...
Bpbutcher's user avatar
  • 133
1 vote
1 answer
333 views

Shape key driver not working with IK bones

Blender version 2.79: I configured a shape key driver for when the leg rotates in X, to repair the "shoulders", but the problem is that the repair shape key shows all the time, even when the ...
Paul's user avatar
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1 vote
1 answer
456 views

How to fix clipping knee joint with ik bones?

I created a quadruped character, and added ik bones to the legs, but the problem is the knees start clipping when it bends. i tried to see if changing the weight paint would help, but it just got ...
Paul's user avatar
  • 372
0 votes
1 answer
1k views

How to switch between fk and ik when they are separate armatures?

I have a model that I want to be able to switch between IK and FK. The ik and fk bones are two separate armatures but connected through bone constraints. How would I be able to switch between FK and ...
user avatar
2 votes
1 answer
158 views

IK claw control with driver / controller

I was doing a claw rigging and in-order to perform the claw to open and closing action I want to implement a driver or an object which will provide its translation data along the z-axis, unfortunately,...
Neail's user avatar
  • 81
0 votes
1 answer
435 views

inverse kinematics with bone constraints only work, if i stop cursor movement and release mouse button

Is it normal, that my inverse kinematics movement which is restricted by a bone constraint only works, if i release the mouse button? e.g. -> movement restricted to x rotation. I can move with IK ...
Chris's user avatar
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0 votes
0 answers
368 views

IK not smooth - snapping

I have rigged a low-poly block character so that it has an IK armature. The problem is that when I try to animate it, when the legs get close to extending straight, the leg will be moving smoothly, ...
RBlong2us's user avatar
  • 1,345
0 votes
0 answers
26 views

Control Bone Has No Fixed Position

I have this rig set up with a IK constraint that has one bone that acts as the control for the leg armature (Labeled in Screenshot). I have been following a tutorial, and it shows me how to rig it, ...
RBlong2us's user avatar
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0 votes
0 answers
138 views

Bone IK Constraints - Bone Transformation Data

I create animations on Blender and export the keyframes using custom plugin to be used in others appliances. In order to run the animation on other programs, the transformation data recorded on the ...
Marcelievsky Romanenko's user avatar
1 vote
1 answer
151 views

Adding IK Problems - shin/forearm sticks out, doesn't follow IK

I'm trying to create an IK for a model, and have tried both of the following tutorials: Blender and Royal Skies LLC. The process I'm following, and the issue I get both times, are both shown in this ...
Candle's user avatar
  • 302
0 votes
0 answers
105 views

How To Create An Ik Rig With A Boneset That Isn't Connected

I'm trying to create a simple IK rig to make animating for games easier. However due to the bone rotations and it not being connected I encounter issues forcing me to animate in FK. I found a thread, ...
Jorge SunSpirit's user avatar
0 votes
2 answers
3k views

Bone Turns Orange And Auto IK Doesn't Work

The model's left leg is perfectly fine. I can select the lower leg and with G, move the leg with auto IK. For some reason, when moving any bone on the body, the right leg's upper bone turns orange. ...
Zoidberg656's user avatar
1 vote
1 answer
836 views

Noob Question: Inverse Kinematics Not Working

I have tried adding Inverse Kinematics to the legs of my humanoid model using this tutorial: https://www.youtube.com/watch?v=jp_SqjB0468 However, when I move the IK bone, the leg won't bend at the ...
SErysuwo's user avatar
0 votes
1 answer
201 views

IK Solver Chain Length reverts back to 0 when changing between pose and object mode

So I've been working on rigging a model for animation and I've set up IK chain links between a few different body parts. For some reason, the left leg of my character model won't maintain it's IK ...
MikeJT's user avatar
  • 21
0 votes
0 answers
242 views

How to apply FK/IK for certain keyframes?

I'm animating a charracter and need him to switch between IK and FK controls for a certain action, but there's no way to set that afaik. If you set it at IK, the entire animation for that body part ...
LuckyCOINNNN's user avatar
0 votes
1 answer
381 views

Animation issue in "Sniper Gun Reload"

i am animating the one of the sniper gun "AWP SNIPER GUN" but the issue is that the reload has to be done with the right hand ,the right hand is attached to the gun means where the right ...
awais niaz's user avatar
1 vote
2 answers
3k views

How to remove IK Target after a certain point without breaking the animation?

I'm creating a sitting animation for a dog. I used an IK target to lock his right leg to a specific location when I was animating his left leg. Everything is fine and the animation is going how I want ...
No user found's user avatar
0 votes
1 answer
405 views

Problem : Character fbx export has weird animation becaus of IK

I made a character in blender and add few actions to that. Also i used IK for legs and every thing is okay in blender viewport and animations work well. But when i export it as *fbx , it’s legs ...
AmiriHusayn's user avatar
0 votes
1 answer
734 views

Rigging two-handed weapon in Blender 2.8

I'm having trouble with rigging a two-handed weapon in Blender 2.82. Basically, I want to achieve this: Such gif was retrieved from a previous questions and answer, but the solution applied for a ...
JMRMEDEV's user avatar
0 votes
1 answer
2k views

Blender IK doesn't bend knee

https://youtu.be/5HBzaBwuUoA In my rig, I have the IK constraint between the shin, the heel, and the knee, but the leg doesn't bend the way I want it to, any help?
IdowhatIwant's user avatar
0 votes
1 answer
171 views

Animation baking error

To showcase the problem the easiest way, this is what the issue looks like: https://youtu.be/esihE0ob7U8 As you can see, the track chain makes a momentary 'jump' when the baked animation is played ...
Donsky's user avatar
  • 1
0 votes
1 answer
530 views

Finger IK/FK not working properly

I am trying to rig my character for animation but I can not figure out why my fingers aren't moving properly. They bend and twist unnaturally. I have weight painted the mesh, but I still can't get the ...
rmorg912's user avatar
0 votes
1 answer
429 views

Twisted IK handles. mesh is twisted. what am I doing wrong?

it is my first time really using blender to make a rigged 3D humanoid with IK handles. for some reason, my model is very twisted and contorted after applying automatic weights. and I've been unable to ...
user106343's user avatar
1 vote
1 answer
340 views

Rigging technique for flexible cardboard packaging

I am trying to mockup a packaging project of mine which looks something like this: When the package is closed a little basket is enclosed by two outer cardboard flaps that come down to the sides when ...
Jonas6393's user avatar
1 vote
0 answers
144 views

Make the pose position equal to the rest position

I want my rest position to be my pose position (make pose position = rest position), because the when I duplicaed one side of my armature to make the right side, one of the arm got flipped and its ...
Samuel Fyckes's user avatar
1 vote
0 answers
499 views

How do I make Hinge Joints, like an elbow or knee, restricted in rotation, but have IK?

I'm fairly new to animating in Blender, so I figured it was about time I learn more about constraints and switching between IK and FK. I just recently figured out how to switch between IK and FK, and ...
Toman800's user avatar
0 votes
0 answers
46 views

IK rig going incredibly wrong

Whenever i edit my rig the ik goes rogue ,this problem is very prolonged , i am having this for long time, for example following are the two pictures of the rig in the edit mode , before editing and ...
SHikha Mittal's user avatar
0 votes
0 answers
225 views

Rigify IK to FK Snap, IK loses Twist

i'm using a superlimb: paw for the foreleg of this horse. i have created a lying down pose with the FK rig. i snapped the IK rig to it, and that worked fine. however, when i switch from FK to IK... ...
blr's user avatar
  • 77
0 votes
1 answer
637 views

IK not moving correctly

I'm having an issue with IK, despite it always working fine previously. I've set up an IK on the lower leg bone as shown below. The IK target is the bone opposite the foot, and the IK pole target is ...
user3501859's user avatar
0 votes
0 answers
263 views

Why can't i turn on inverse kinematics with rigify

I got a rigged 3d model and for some reason when I try to turn on inverse kinematics an error pops up saying ...
Bee_Beau's user avatar
1 vote
0 answers
76 views

Blender for online human-movement visualization

I would like to know if I can use Blender to visualize human motion in an online manner. In my setup, I will have motion capture system which will provide the position of some arbitrary marker (...
M80K's user avatar
  • 11
0 votes
1 answer
221 views

IK Bone setup , pole bones targets the bone wrong direction

Hey guys I have imported a character from CC and I tried to add IK bones. After added the pole bones I have a issue something like that . I feel like it cause of bone rotations but I could not fix ...
ilhan keskin's user avatar

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