Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
0answers
9 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 ...
0
votes
0answers
9 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 ...
0
votes
2answers
26 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 ...
0
votes
1answer
11 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 ...
1
vote
1answer
42 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 ...
0
votes
1answer
25 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?
0
votes
1answer
21 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:
0
votes
1answer
26 views

Keeping the knee grounded

I need to create an animation where my character sits on his knees. How would you set up the leg IK to achieve this? It looks to me that the best approach is to create the hierarchy of LOWER LEG(...
0
votes
1answer
7 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 ...
1
vote
0answers
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 ...
0
votes
0answers
12 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 ...
0
votes
0answers
10 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 ...
1
vote
1answer
44 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 ...
0
votes
0answers
30 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 ...
0
votes
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 ...
1
vote
1answer
23 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 ...
0
votes
1answer
58 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 ...
0
votes
0answers
16 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 ...
9
votes
1answer
1k views

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 ...
0
votes
1answer
20 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 ...
0
votes
0answers
21 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 ...
0
votes
0answers
14 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 ...
1
vote
0answers
38 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 ...
1
vote
1answer
30 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 ...
0
votes
1answer
14 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 ...
0
votes
0answers
19 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 ...
1
vote
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 ...
0
votes
0answers
51 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 ...
0
votes
1answer
27 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 ...
1
vote
3answers
64 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 ...
0
votes
1answer
15 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 ...
1
vote
1answer
153 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 ...
0
votes
0answers
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: ...
0
votes
1answer
88 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 ...
0
votes
1answer
12 views

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 ...
0
votes
0answers
45 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 ...
0
votes
1answer
38 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 ...
0
votes
0answers
146 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/...
1
vote
0answers
14 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 ...
0
votes
0answers
24 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 ...
1
vote
0answers
199 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 ...
0
votes
1answer
55 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 ...
1
vote
0answers
64 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 ...
0
votes
0answers
55 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.
-2
votes
1answer
34 views

Problem in using Invers Kinematics

Please help me, how can i fix it ???
0
votes
1answer
55 views

How to change Chain Lenght in Inverse Kinematics?

I'm new in Blender. I have a character and I have some problem with his leg. Chain Lenght is 2 in left leg but it's 0 in right leg. I wanted to change it for 2, but my character fell apart. I watched ...
0
votes
1answer
107 views

Rigging problem with IK: why do the bones turn around?

it's my first time doing this and I have no idea what to do. I have seen a lot of youtube tutorials and at some point my results differ from the video even if I followed it exactly. As you can see in ...
1
vote
0answers
150 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 ...
0
votes
0answers
394 views

How to setup IK Arms with upper and lower arm twist bones?

I have two bones for the upper arm, and two bones for the forearm. This is to assist in proper deformations when rotating the elbow and wrist, respectively. (ie: Using forward kinematics, if I want to ...
0
votes
2answers
61 views

some vertices don't follow bone chain with Spline IK

I have made a complex ribbon-like structure (DNA strand), rigged it with bendy bones and made it follow an Archimedic spiral. In one strand, this worked perfectly (1st image), in the other some ...