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 with inverse kinematic
I would like to encourage a movement for this model. Does it make sense to use inverse kinematics here? How should I proceed here?
I have already tried to recreate this with bones, hopefully it will ...
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Problem with auto IK, some bones turned stiff (Auto IK doesn't work)
First time working with armatures and IK, I had a rig working and somehow I did something that broke it. I'm using the Auto IK option for it.
It's a 2D spider (don't mind the leg count) and each leg ...
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Bone rotating in IK despite axis lock
I have an ik chain of 2 bones. I have it set so that the first bone has a y axis lock but the second bone has an x and z axis lock. In spite of this, when using the ik, the first bone still rotates in ...
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What's an IK Setup that Allows Hands to Stay Planted?
After some months of learning Blender, I've reached another roadblock. I looked up an IK setup for feet and legs, which works great with no complaints. I then started work on an animation involving ...
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Bone constrained to external object, how do I edit or remove this constraint?
So I created a character model a little while ago, did some animations that involved that character being in handcuffs, and do so this, I somehow constrained the IK controller of the hands to the hand ...
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Setting inverse kinematics relative to local coordinates of an object
I’m just studying rigging, and I have a non-trivial problem that I can’t solve on my own. I’m trying to create an IK with a limiter for the mechanical limb. When I rotate the object relative to the 3D ...
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Armature Posing Abnormal Hip Line & Legs Cave In
I made an armature and connected it so a stick figure I made. The issue I'm running into is when I bend the knees of the armature. The upper thighs of the figure begin to cave in, and a line appears ...
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Corrective shape keys for IK-driven bone
The bottom bone here is affected by an IK chain:
Unfortunately, it's rotational value doesn't change unless I rotate the bone directly.
This is a problem, because I want to use it's rotational value ...
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IK for servo-based robotic arm
I'm looking to model a very basic servo-based robotic arm using IK in blender. I have an armature with two bones (1 joint where the bones meet). I've enabled IK as an Empty on the tip of the last bone,...
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Toggling IK on and off will change the bone's transform position slightly
As stated in the topic, whenever I turn on/off the IK bones, their positions drift a little bit. And I cankeep changing their positions by keep turning them on/off.
Why is this happening? And how do ...
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Bar Linkage - Inverse Kinematics
I am trying to make a linkage assembly using inverse kinematics. I have two arms parallel to each other which are to rotate with one another, while a link connects the two and is to stay parallel to ...
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Why does a stretch IK shrink?
I have two IK chains for my leg.
One has stretch enabled, the other one doesn't so I can blend smoothly between them.
In the default position the two chains align perfectly.
Something I've noticed ...
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Model's wrist shrinking with IK arm rig
I'm trying to animate a shot where my character looks at the palm of their hand, but the wrist shrinks when its rotated.
I know the rotation should really be in the forearm but I don't know how to do ...
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Auto keying in real time works incorrectly with inverse kinematics
When recording an IK chain's motion in real time, the resulting animation does not match what was gestured during recording.
What I gestured:
What I got:
Is this a bug or am I missing something? I'm ...
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How can I stop IK bones from spinning randomly?
I'm trying to rig Oleg Ushenok's Mech Spider. I'm using IK bones for the little pistons that are all over the model. I like the 3 part motion that it gives rather than the typical piston setup. The ...
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Double-Jointed Leg Rig doesn't equally distribute rotation amongst joints
I'm trying to make a simple leg rig, but I want to make the knee have its own bone. The rotation should interpolate between the other two bones. I have Inverse Kinematics set up, but it doesn't rotate ...
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What is more preferable to use combined FK/IK rig or separate rigs?
I'm newbie in blender and making my first animation all by myself.
So what will be more user-friendly for me and what are pros and cons overall in both variants?
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How would I rig an ammo belt?
I would to rig an ammo belt so that one end moves while the other stays still like the images below
Credit to Sibience on sketchfab for the APU model
Sketchfab animations showing how exactly I would ...
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What is a good way attach the wire to the metal arm?
Both of these are IK, but I want to rig it so that the wires are dangling off of the Arm. I don't know how to accomplish that.
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How can I fix this Jittering in my IK rig?
I'm having a Jittering problem with my IK rig for a robot arm. I have included video and my .blend file. The Jittering occurs even when I remove the constraints. The only time it does not happen is ...
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Is there a way to do Inverse Kinematics on a non-standard skeleton?
So I'm trying to make new animations for a fairly old game. I've managed to get Inverse Kinematics to work with the skeleton by stretching the bones to connect to each other, but I can't use the ...
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Issue with Rotation in 4-Bar Chain Mechanism in Blender
I am currently working on a 4-bar chain mechanism in Blender and have encountered an issue with the rotation of the bones. Here's the setup:
I started by adding a series of bones, with the last bone ...
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Rigify glitch hands move on its own, root rotation
I've done rig the character, but when i move the root on the z axis the hand moves on its own like on the next picture.
The hand move up and down just because i rotate the root
I use these constraint
...
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Root of IK arm is twisting
The root of my IK arms are twisting, this is because I need to either roll the bones or apply a pole angle in order to make the elbow fold in the correct direction, unparenting and removing the ...
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Character's Arms and hands Stretching/deforming after exporting animation as FBX file
I've created a custom rig using the workflow shown in Pierrick Picaut's "The Art of Effective Rigging" course. Everything seemingly works when creating animations inside of blender, but once ...
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How to copy a bone world space location to an empty on all frames?
I have a bone that is animated. It has keyframes on all the frames of the timeline. I need to add to that bone an IK target (empty object) that plays the same animation of the bone before it was ...
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Asset library won't work with my ik rig
So this is my first time working with the new pose library so maybe I’m doing something wrong but when trying to make a pose with a custom ik rig I setup it won't save the pose it just does nothing. ...
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Limit stretch length of bone driven by IK
I am rigging a mic stand, and using stretch bones to drive the position of bones parented to the mesh. I'm using an IK on the end of the stand, to control the position of the mic arm.
My issue is ...
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Inverse Kinematics - Bones doesn't show up
I'm very new to blender.
I did some tutorials building and rigging basic characters. Last week I decided to built my first charcter on my own. It took a long time but I'm happy with the result.
I ...
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Parenting Bones to IK Control Bone- Are Transforms inherited?
I have a Problem with my IK.
I parented the Circled Bone to the IK Rig's Control Bone (Facing toward Camera). But the Circled Bone inherits weird transformtations.
When I move the Control Bone in X, ...
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Leg and Arm IK bend weirdly towards Pole Target
I'm currently following the YT series from Royal Skies about how to rig.
But for some unkown reason when i move my legs or Arm IKs at 90/-90 Pole Angle they are not pointing towards the Pole target ...
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IK Pole Target Angle Dial
So I've been working on a complex rig for a long time. So long I would prefer not to admit the actual time I've put into it. However, I cannot design a pole target setup for IK that I can be happy ...
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How do I move IK models from one blend project to another?
I have two different models using IK and I was wondering how to transfer one model to the other's blend project without losing IK constraints.
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IK rig bending incorrectly
Specifically, the knees seem to be bending... Inwards? This is a basic, custom IK rig, based on this tutorial from Ryan King Art. You can see the issue below. Blend file is there too.
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How to control the position of an IK bone using another object
I have a character who needs to open a cupboard. The simplest way to do that seems to be to add a ChildOf constraint to his hand controller, link it to an Empty which is parented to the cupboard and ...
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Control a bone axis using another bone
I would like to rotate the length axis of an object (or bone) that is otherwise rigidly fixed/parented to a moving second object. I want to parent a/another bone to the second object that always ...
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Limit rotation axes of a bone driven by an IK
I'm trying to add bones to the standard human metarig to control an exosuit that moves with the leg. The chain of new bones is fixed at the models back, then runs down to the knee. I've tried linking ...
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Copying animation using copy transform on IK pole/target bones
I have a very specific question. I am trying to compare a human MOCAP animation to the same animation, but where the interlying bones are controlled by IK. So I would use the same end-effector and ...
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IK controller won't bend joints but only moves the entire arm
The arm from the bottom has three bones. Upper. Lower. And hand. With the bigger one being the IK controller. And the one from the side is the pole.
And when I tried to move the controller this is ...
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Fixing the pivot point of IK arm
The forearm bone connects to the upper arm and then to the shoulder/collar bone. I need it to pivot around the last bone and not the shoulder/upper arm bone.
I know how to increase the chain size but ...
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Why is my pole target not locking the angle of my IK leg?
I'm trying to rig a humanoid low poly character in Blender 2.82, starting with its legs. For this, I've been following two different tutorials on YouTube but they fail me at the same point :
Rig ANY ...
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Train Pantograph IK Rig - Rotating armature in Object Mode changes pose
I am a beginner with rigging in Blender. I have successfully created a rig to pose and animate a train pantograph using inverse kinematics. Now, I want to reposition and rotate the complete armature ...
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IK Stretching Without Deformation
I was wondering if it were possible to setup an IK stretch on a bone so that it only extends along the Y axis and doesn't inflate/shrink the mesh, just extends it; as if I were moving the bone it were ...
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When trying to allow rotation to my IK rig it jumbles up my bones and mesh, why is it doing this? What can I do?
I'm quite a noob at rigging just FYI.
In my IK rig I have 7 bones in the spine of a robot with 7 vertebrae that are joined into one object parented to the 7 bones, I have one skull bone that those 7 ...
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Why is the inverse kinematics not bending straight, but rather slightly off to the side?
No matter what I do, it doesn't seem to bend straight. I added a proper 3 chain lengths as well. Here's an image as to how it bends:
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How do I make an on/off switch for FK and IK limb rigs?
I want to try and do the same thing rigify's rig system did and make a menu that allows me to switch between the IK and the FK limbs for my character's arms and legs. Right now, all I have is one ...
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IK only moving the last bone of the chain
I have this skeleton for a cow :
With this property for both IK bones :
The problem that I have is that when moving the front leg, the bone directly connected to my bone with IK constraints will not ...
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How can I make an IK leg rig with a retractable foot part?
Hello.
I want to make an IK leg rig. The green part is hidden in the blue part. But I want to be able to come out. Normally the end of the blue part is the last chain of the IK and the part touching ...
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Arms move in wrong direction while legs are fine
My model's arms bend backwards at the elbow when moving them toward the back of the character, but my legs act perfectly normally.
The only guides I've seen that seem like they might have the solution ...
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Something is wrong with my scaling
Following a tutorial like my recent questions,
link to that down the bottom.
I have come across another problem, this one being when I scale some bones that aren't attached they move instead of going ...
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