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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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12 views

Changing Influence value on Bone Constraint frame by frame

So i'm new to animating in Blender. And I'm currently having trouble with the 'Child Of' on the Bone Constraint, for some reason the 'Influence' value is not working frame by frame. What I mean by '...
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11 views

Bone Constraints do not appear in the bone constraints tab

I imported an XPS model into Blender with the XPS addon. Then I found that its IK doesn't work properly. So I decided to clear the constraints and fix it myself. But I found nothing in the bone ...
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15 views

Bones warping out of place with inverse kinematics

I've been struggling with this problem for a while now. When I add inverse kinematics to my quadruped animal's front legs and try moving them in posing mode, the entire leg warps out of place and ...
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1answer
22 views

Inverse Kinematics Knee

I'm out of options, I have to ask... Why is the knee in the below picture not always pointing to the ik.knee.l bone? I've read this (VERY informative) and I also followed this tutorial... But no luck....
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1answer
25 views

Ugly deformation for wrist and shoulder with IK

New here. I've been implementing some basic IK stuff for a rig of mine. The arms, the legs, etc. Overall I'm happy with how it's been going, but there is a problem. Whenever I go to push the rig's ...
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1answer
63 views

Rigging this mechanical linkage in Blender

I am tackling this mechanical linkage which moves in the x axis (see image). I would like to do it using IK but the problem is that I can't establish a relationship between the blue and green parts ...
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26 views

Pinning foot in place / IK without creating new bones

First of all, I'm new to animations and Blender. Here's my problem: I'm trying to make a new animation for a computer game (Gothic 2, if anyone is familiar with it :P). I want to find an easy way to ...
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12 views

Inverse kinematics without a target, or by targeting to self

I have a complicated rig where the end bone in an IK chain needs to exactly copy the transforms of a separate control bone, so i can't have a target bone because that would mess up the "copy ...
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2answers
125 views

How to IK Rig a human arm with external controllers?

So in the above image: Symbol Description S - Shoulder U - Upper Arm L - Lower Arm W - Wrist F - Fingers Now, I have to IK-rig it from upper arm to fingers and I was ...
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1answer
35 views

Exporting Animation without IK targets, poles bones and other controls

I've created a character that has been rigged with IKs constraints for legs and arms and some other custom controls implemented through other constraints applied on control bones (like a copy rotation ...
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1answer
72 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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1answer
26 views

Why did my IK bone shrink?

I was animating a run cycle and this happened at some point but I can't figure out how or when. Any help?
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1answer
26 views

How to move bones with IK?

Hi, does anyone know how I can move the end bone? The bone only rotates or scales depending on the connected checkbox. File here:
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1answer
13 views

Does 'Inverse Kinematics' override other bone constraints?

Rig is for a quadruped, I have IK applied at second bone, but I want to place a limit on the to the toes, so that they can't go below 0 on the Z axis. Selecting the Limit Location bone constraint ...
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33 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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18 views

Should I include shoulders in arm IK?

When doing inverse kinematics on arms, is it a bad idea to have the shoulder bone be a part of the reverse chain? I find it very hard to constrain the rotation of shoulders when I include them. I ...
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12 views

how to set up IK bone copying y rotation of target bone

I am setting up wrist IK and trying to get the forearm to copy the y rotation of the hand/ik target. I put a copy y rotation constraint on the forearm directed at its IK target and it works for y only ...
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1answer
54 views

Mirrored pose problem (IK goes crazy)

I have a problem when I try to mirror my run animation, the IK bones on the foot go completely out of control on the mirrored portion of my animation. The white keyframes are what I copied, and the ...
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35 views

Activating IK on Existing Armature

How do I activate IK (Inverse Kinematics) on this rig? I feel like it has the necessary bones. I appreciate your help. I would really like to enable crouching and gyrating of hips for dance animations ...
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1answer
23 views

Bone won't bend in quadruped leg

So I am rigging a fox mesh, and the method I used of inverse kinematics isn't working like it has on numerous quadrupeds I have rigged. So the leg has four bones in it. Now I put the IK on the second ...
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1answer
25 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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1answer
96 views

Copy rotation rotates through wrong axis

I want to rotate hand bone when I rotate IK bone as well. So I decided to using Copy Rotation constraint. Here's how looks like: Nothing special, important thing is that Hand Bone has Copy Rotation ...
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56 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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1answer
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How to rig a cartoon-style hose limb?

I was wondering if anyone knows how to set up a hose-like, cartoon-type limb like in this picture? My current setup for my model's limbs uses Inverse Kinematics and actually works quite well for the ...
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1answer
21 views

IK Constraints Swinging Around Wildly

My IK's are out of control. I've set up enough simple IK's to know how to do it correctly and I have not idea what's going on here. I've tried redoing the IK's, recreating the bones completely, but ...
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25 views

How to use spline ik with curve with modifer applied? (How to use splike ik, for snake movement animation ?)

I try to use Spline IK Constraint to make "Snake move". I have armature with 4 bones, and I apply Spline IK Constraint to it. Its don't want to work with curve after modification, it uses curve ...
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17 views

Rigging, how do i keep my target at the bones position?

in my project, i want my target bones root(1) to always have the position of the given bones tip/root(2) even if i change my pose with ik, but i dont know which constraint would achieve it. And i ...
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57 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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1answer
34 views

How do I properly fit this tail with IK?

I have this tail rig that I'm using IK to animate with. I'm fairly new to rigging and IK, however, I've come this far: The problem is I want to have more control over the curve that the IK Target ...
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1answer
19 views

IK constraint causes crazy global rotation

I was following a rigging tutorial (first minutes of third video) on a simple model I made earlier. But when I add an IK constraint on the bone shin.L to have the bone foot_IK.L become an IK ...
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23 views

How to make two bones rigid

Hello, I have rigged two reciprocating motion actuators just using bones. I would like to connect two actuators together with two bones and add IK constraint and have the connecting piece lean certain ...
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1answer
26 views

Incorrect IK behaviours

I am rigging a robot for some personal training, and I got into a very weird issue while rigging the legs. Here are my two foots, both are parented to the right bones, rigged to their respective ...
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0answers
91 views

Switching from IK to FK-losing pose

Learning rigging and ran into this whole ik/fk switch thing which is confusing. I rigged a leg using the usual IK(heel influencing shin>thigh), I keyframe a leg raise and see that to get the exact ...
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1answer
46 views

Rig with sticky feet and hands, how do I create arm swings? (ex: playing tennis)

I've been using this tutorial ( https://www.youtube.com/watch?v=Q9f-WVs3ghI ) to create sticky feet and hands for my character rig. Sticky feet I've noticed is pretty standard for character rigging ...
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3answers
83 views

Why does the elbow turn the wrong way?

I'm doing a character for a (very) low poly game. Since I already had a very basic IK rig laying around, I figured I'd adapt its armature to the recently created character. However, even after ...
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1answer
16 views

Made the leg IK bone, tried to attach the upper leg bone to the pelvis but after attaching it, the body rotates a little bit

I'm relatively new at rigging in Blender, and I tried to rig a humanoid model that I made. Everything went fine, but after finishing the leg IK bone, I tried to attach the upper leg bone to the lower ...
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1answer
234 views

Simple Inverse Kinematics for a slider?

I tried recreating something like this: https://www.instagram.com/p/Bk1tq1DgMRV/?taken-by=flvio.cc The head can move on the x and y axis. The model itself is done, but I just want to move the head ...
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12 views

Display rotation of certain bones in a kinematic study model

I'm creating industrial robot inverse kinematic rig. Is a way to display rotation of a bones after placing IK bone? The best would be a kind of chart thet shows rotation for any of 4 motors like this: ...
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1answer
162 views

Rigify IK Not Working Properly

I've been working in a character during my free time, and I came to the point where I decided to Rig it using rigify. Everything went fine.. Until I tried bending the legs. Instead of bending like a ...
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1answer
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pole targ it does not work as I would like

I'm working ik, and I try to put them a pole targ but this one does not work like I want. I'm using the pole targ to simulate the elbow but as you can see in the picture this nose bends like a piece ...
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68 views

Converting FK pose to IK pose

I have two version of the same character model One with regular FK armature And the other one with IK basic armature How can i pose my model with FK bones and then translate the pose for the version ...
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1answer
64 views

Leg bones twisting backwards when moving leg up

The leg looks fine up to this part: However when I go further up it just twists and flips backward like so: I've scoured the internet and can't find a solution. The pole target offset is at 90 ...
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0answers
150 views

How to Add Foot Pronation/Banking to Foot Rig?

Oliver Villar has a foot and leg IK rigging tutorial on YouTube. He covers heel roll and foot roll controls, but only briefly mentions using two extra bones (per foot) to add left and right pronation/...
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20 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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0answers
27 views

Impossible problem - flipping animation across x axis using IKs?

Ok, While I have tried every solution posted here (mainly the Command - C, then Command-Shift-V to copy with flipped x axis) on how to flip an entire animation across the x axis (it's a walk cycle) I ...
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0answers
283 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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1answer
64 views

Save ik bones after bake action for backup

Hi how do we save ik bones after baking action? After baking action, normally i’ll delete the ik bones so i can work on another animation in another action. Occasionally, i’ll need to enhance ...
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0answers
79 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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74 views

IK Pole Target directing to wrong direction

I have no idea why the pole doesn't follow the target, instead, the pole avoid it, i've tried to ROLL the bone to 0 degree. The result still the same.
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1answer
36 views

Problem in using Invers Kinematics

Please help me, how can i fix it ???