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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How can I make an object's tip position exactly where the IK controller bone is?

So I have this robot leg I made. This is the current setup I have The selected bone is the IK controller bone. When I tried to move the IK bone to the 3D cursor in edit mode I get this. So as a work ...
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Is there a way to make inverse kinematics target anywhere on a path or surface instead of just a point?

I'm trying to make an animation of someone playing the piano (as automatically as possible using the MIDI). It would be nice if I could make them hit somewhere on the key instead of having to specify ...
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Can you rotate bones within an IK Chain and allow the IK Target bone to move along with it?

I have a robot arm rigged with an IK and down the chain of the IK there is a joint specifically for rotating on the bone's Y Axis that allows the entire lower arm to rotate. However once I move the ...
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Rigging: leg IK is behaving wierd. Clothes are tearing

For some reason, My Leg IK is not behaving properly. Clothes are tearing apart on bending the leg. I following this tutorial for LegIK and setup pole target.
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How to Avoid/Correct Circular Dependencies on IK Rigs with Drivers?

In reference to this report on mis-behaving IK rigs-- https://developer.blender.org/T76158 The answer is, IK rigs with dependency cycles have undefined (glitchy) behavior. My follow up questions are:...
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newbie question: Move several bones with one control

So i have a humanoid rig and i want it to only do one thing - open and close arms as if hugging someone. I want to have a single control (with one degree of freedom) that moves all the bones ...
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How to make IK target bone undetachable?

So I have a arm, and a IK. The target bone of the IK is called wrist. My goal is to make the wrist bone undetachable from the IK bone. This is what I don't want. The wrist bone (purple one, is ...
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Character model going crazy after parenting

For this first post, I wand to detail a weird issue for my character model. I am new to IK rigs, and I just finished my character. The armature has absolutely no problem. After having parented the ...
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Bone rigging incorrectly

I am making a rigged character. When the wrist is lifted up, the whole arm should move, and the torso should not. The correct 'connecting line' from the wrist to the collarbone (may be hard to see, ...
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The rig rotates automatically when the desired pole target is set in Inverse kinematics

I was rigging my character seeing the tutorial by CG Geek https://youtu.be/SBYb1YmaOMY?t=450. The same process was done but my rig rotates out of model
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Is it possible to add IK's to a pre-existing rigs?

Im trying to add IK' to this model's pre-existing rig, but have no idea how exactly todo it In this case. Is it even possible? This is the file:
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Pole target drags behind IK

I'm learning how to rig and one of the problems I have is trying to have the pole target bone move with the leg to keep the direction it's pointing at the same. I know I could parent the pole to the ...
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Shoulder rigging, collar bone not following bicep bone

I am new to rigging, wanted to rig a model myself with IK etc, so that I can pose it and so on. There is a tutorial I tried to follow but it just does not work like the guy is explaining. Basically I ...
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Change influence of IK?

If I have bones in an IK, like from a hand to a shoulder, I want the bones in the arm to rotate as usual, but I want the bones in the shoulder to move much less in response, but not none at all. In ...
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IK bone for arm animation issues

I am having an issue with a 1 chain-length IK setup where the limit distance constraint on the IK bone does not actually work. Visually it works, however the animation is still acting as if the bone ...
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How to mimic IK to move a bone using Python without actually setting up IK?

Using Python in the script editor, I am currently moving my skeleton using motion capture data. For times when the data jumps to an inaccurate place or when there are gaps in the data, I want to use ...
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Is it possible to combine spline IK for the body and regular IK for limbs?

I've got a centipede model with an IK rig. I would like the spine to move along the spline curve in the background, following its curvature, while still letting me pose the legs like normal to make ...
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Sequenced Bone Movement with IK

yet another IK question.... I'm working on an animation project where I have an accordion wall segment that needs to extend outwards, one fold at a time. When I create the the IK bone setup and pull ...
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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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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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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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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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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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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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IK Legs Mess Up in Render

I have created an animation with this robot, and everything looks fine and normal in the viewport, but once I render it out in any render engine it does this weird thing that you see in the first ...
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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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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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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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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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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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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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Targeted bones don't move with the rest of the armature

IK bones don't move with the rest of the armature Ask Question Asked today Viewed 9 times 0 Whenever I move the main controller bone of the mesh, most of the armature moves except for the bones the ...
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I rigged a human model with Inversed Kinematics but it is not working. How can I debug this?

I'm having a hard time understanding how to debug my rig not working. I created the human model and now I am trying to rig the right leg. How could share more information about this? I would like my ...
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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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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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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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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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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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108 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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66 views

How to scale along a spline Ik rig

I was curious if it was possible to scale this along the spline of a spline IK rig almost like it was growing along the spline. Below is how it scales now but I do not want it to look like this I ...
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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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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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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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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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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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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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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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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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3-bone IK chain not rotating properly, why?

I ran into a weird bug where my 3-bone IK chain isn't behaving as expected. I've made other quadrupeds in the past and had no problem like this. As far as I can tell, the IK constraint is also exactly ...
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inverse kinematic animation alignement of mouvement issue

I have rigged this elephant mesh with inverse kinematic but when I move the leg with the controler bone, the leg bend inward (my goal is to have a leg that bend along the Y axis). Here are picture to ...