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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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Can I prevent a specific bone from moving during Auto-IK posing?

Can I limit chain length during Auto-IK posing, or otherwise prevent the movement of specific bones? I'm familiar with the ability to limit chain length when setting IK bone constraints, but I don't ...
Brook Miles's user avatar
1 vote
1 answer
2k views

Adding Armour to Rig

So I have a model of the Master Chief (Halo 5) that I downloaded from the internet, and I constructed a rig for him. The rig works fine But when I add the armour to the rig I get bad distortion (...
masterj2001's user avatar
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0 answers
166 views

Is it possible to get a list of sub-layouts from a self.layout and insert buttons on it?

I'd like to write an operator to set the correct pole angle for IKs, so adding a pole target won't move the rig. As I'd like to add a button next to the pole angle property field in the UI, found out ...
Fernando D'Andrea's user avatar
0 votes
0 answers
823 views

I want to make this eye blink

I have modeled a little doggy and I wanna make her eyes blink. What I have created are two quarter spheres that set at the back of the eye behind the mesh to roll on the x-axis over the eyeball. I ...
Samuel's user avatar
  • 1
1 vote
1 answer
2k views

IK local rotation locking

I have an IK chain, and there are some axes that I don't want some bones to rotate around. So I go to the bone tab, scroll down to Inverse Kinematics, and lock the axes I don't want the bone to rotate ...
Gliderman's user avatar
  • 598
1 vote
1 answer
549 views

Inverse Kinematics Documentation

I am currently writing a thesis and for the practical part I use blender to simulate something with the Blender IK Solver ( and iTaSC). Are there books etc about the implementation or the usage of the ...
Alexander Weller's user avatar
3 votes
1 answer
9k views

How do you lock the rotation of a bone in an IK chain?

How can you make an IK chain of bones where one of the bones does not rotate relative to it's parent bone but is still part of the IK chain? Specific example: I have this simple arm rig with IK that ...
Ben Mora's user avatar
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1 vote
0 answers
409 views

Get bone rotation from IK

Is it possible to get the xyz euler rotation of the bones in an armature that is controlled by the iTaSC IK solver with python? With the rotation I mean the difference e.g. between the start and end ...
Alexander Weller's user avatar
0 votes
1 answer
617 views

IK show bones Degrees of Freedom

I rigged a human and now want to set the limits. I have a blue / red ring that visualizes the limits on the x and z axis but not on the y axis ( I just found out that I can deactivate them by ...
Alexander Weller's user avatar
0 votes
2 answers
2k views

Adding a pole target causes bones to ignore their IK constraints

I currently have a robotic arm rig with the shoulder only being able to rotate along 1 axis, and the bicep only being allowed to rotate along a different axis. I am controlling these bones with an IK ...
colorbomb's user avatar
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1 answer
6k views

Disable stretch in IK bones

I'm using the nice rig from BornCG tutorial, and when I move the hand IK targets, the arms do not stretch, however, the legs do, and I can't figure out how to prevent them from doing that.
Niclas's user avatar
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IK Rig (Pole Target Issue)

Hello there so i have a mesh with IK set up for the arm however as soon as i add a pole target and go back to Position moving for the IK Arm It Screws up the Mesh this only occurs after adding the ...
Waka Flocka's user avatar
0 votes
0 answers
815 views

My IK rigging is backwards. Twisting the mesh and pointing the wrong direction

I am an amateur rigger at best. I do not have much of a grasp on the technical side of it, so this probably seems very stupid. My rig is putting a "knot" in my mesh and will only work if the IK is ...
Uglyfire's user avatar
8 votes
3 answers
12k views

What is Inverse Kinematics?

Why do we need the Inverse Kinematic constraint in rigging? What is the benefit of it, what is a situation where I can use it and what does it do to the armature?
Mahmoud Elkout's user avatar
0 votes
1 answer
487 views

Blender 2.78a crashes when setting up IK system [closed]

Okay, this has wasted fifteen minutes of my entire life. I'm using Blender 2.78a with a Windows 32-bit OS. I was just following a character creation tutorial in Youtube and I made it till the end of ...
QuantumCookie's user avatar
1 vote
2 answers
585 views

How do I put a constraint on a bone affected by chain length?

I'm trying to figure out how to put a constraint on the shoulder bone as shown in the images below. What I'm looking for is a realistic motion where the shoulder moves upward ONLY when the arm bone ...
xxhoisinxx's user avatar
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0 answers
108 views

Control the location of my IK bone

I've created an IK bone for my left arm of my armature. I wonder how I can control it's location to be beside the armature around the hand. As shown below, when I grab it all the way it goes far from ...
Tak's user avatar
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2 votes
1 answer
2k views

How to switch to Inverse Kinematic for Make Human model in blender 2.78?

I exported a human in mhx2 format from MakeHuman and imported it to Blender 2.78a. What is necessary to install in blender in order to see the MHX Main panel and/or switch from FK to IK mode for ...
camcam's user avatar
  • 135
1 vote
1 answer
8k views

IK not working properly

I did the exact same IK steps in two armatures and one of them SimpleArmature works great, but with the second one HumanArmature...
Tak's user avatar
  • 6,303
0 votes
1 answer
238 views

Inverse Kinematics in BGE not working

I'm beginning in Blender and trying to create my first test game, but now I'm stuck in the creation of a aim system. Basically I created a tank model and associated an armature in it. Then, I created ...
Fernando's user avatar
7 votes
2 answers
18k views

How can I seamlessly switch between IK/FK?

How can I switch between IK/FK without having bones changing their transformation? I have forearm bone with IK constrained. Now I want to disable IK and rotate forearm. The problem is whenever I ...
blablaalb's user avatar
  • 177
2 votes
1 answer
407 views

Bending animation with rig?

I'm trying to make an android animation, but I am stuck at the rigging part. I want his arms and legs to be able to bend like plastic / rubber and use a rig. I've heard of lattice modifier, but that ...
tastyturban's user avatar
0 votes
1 answer
910 views

Character deforming with rigging and adding automatic weights

Im super new to blender so.. I have no idea what I'm doing wrong. I added some bones and IK and every time I add automatic weights his body gets all twisted and deformed and distorted. I tried a bunch ...
JennyAlpin's user avatar
1 vote
1 answer
2k views

Problem: Armature deforms mesh when after parenting

I am fairly new to Blender and recently I've been working on a new character rig from scratch. I've got the character mesh all drawn out and right now I'm learning from online tutorials on youtube on ...
SmileyFace's user avatar
1 vote
2 answers
597 views

MakeHuman Inverse Kinematics

I have a makehuman model that I want to use for animating. However, with the current forward kinematics, it's very difficult to animate each bone one by one. So after messing around, I figured out how ...
Bradman175's user avatar
3 votes
1 answer
1k views

Mesh is deformation is mirroring very strangely, how do I fix this?

I am rigging a crossbow to be exported to Unity3D. It is currently just a model of a bow, and I am trying to perfect the rig as much as possible before I model the stock. I have been trying to fix a ...
FeeeshMeister's user avatar
1 vote
0 answers
270 views

Inverse kinematics offset?

I have a problem with my rig. As I put a IK constrain on the two bones, the constrained one is just offsetting as shown in the screenshot below Is there anything I did wrong? Best regards
user3549183's user avatar
3 votes
1 answer
4k views

Why is my model distorting when I weight paint?

After importing a .OBG file and rigging it, when I weight paint, my model deforms. I use Blender v2.77 .
F. Lu's user avatar
  • 35
0 votes
0 answers
821 views

Strange behavior of animation constraints

In my recent rigging tests i encountered some weird behavior when using animation constraints. In this example you can see the foot is lagging some frames behind. Also if you cancel the animation, ...
Demons Fate's user avatar
1 vote
2 answers
899 views

Inverse Kinematic Panel disabled from Bone tab

I cannot restrict the rotation of a Bone in Blender... I have done it on the previous project, but now it is disabled and I cannot figure out why.. Any ideas would be much appreciated, thanks.
Pontios's user avatar
  • 151
3 votes
1 answer
613 views

Model gets squished because of Spline IK

Recorded a video of the issue happening: https://youtu.be/LFoUrE1OHwQ Added a gif in case the video goes down: The head of my character gets squished when one of the controls for the Spline IK is in ...
Opponent019's user avatar
1 vote
1 answer
646 views

IK not working for legs, where am I wrong?

I'm stuck in this armature creation where IK works pretty well for harms but knees don't curve as they should.. I set same but something is not working..
Francesco Yoshi Gobbo's user avatar
2 votes
1 answer
2k views

Why does this Copy Loc contraint not work with this IK bone?

I'm working on a (toy) VR kayak simulator, but have limited rigging knowledge. I'm attempting to have two IK rigged arms holding onto a paddle, so they will animate with the paddle's movement, like ...
Jordan Davis's user avatar
1 vote
1 answer
1k views

IK lagging behind to point at target bone

I am using Blender 2.75. So I have an armature for a pig. I used IK to have the legs always bend (a certain direction using a pole target) to connect with the target bone. I am pretty sure this is ...
Gliderman's user avatar
  • 598
2 votes
1 answer
205 views

How to make an IK chain stay above another IK chain

I modeled a recurve bow and now I'm rigging it. The wooden body of the bow bends correctly. But at the start of the pulling motion the string's IK chain straightens and goes trough the tip curvature. ...
Cesco's user avatar
  • 21
1 vote
1 answer
942 views

How to maintain IK chain angle to target?

I've got a robot assembly arm (http://sendvid.com/ze9l813s) set up with an inverse kinematics solver, but I don't know how to keep the end bone from rotating. I need that bone to remain perpendicular ...
Sanix25's user avatar
  • 529
1 vote
1 answer
1k views

How to make sure the final bone in an IK chain doesn't rotate?

I've got a chain of inverse kinematic a bones, and I want the one that I grab to be unable to rotate while it is moving. How do I do this? My setup is a rigged car assembly arm: http://sendvid.com/...
Sanix25's user avatar
  • 529
0 votes
2 answers
5k views

How to export rigged character with ik or fk with .fbx format

I want to export my 3d modal with ik in .fbx format. I also try this with export my rigged character with .fbx format but it`s IK is not working after import it again. One more problem is ik bone ...
hardwork's user avatar
0 votes
2 answers
1k views

IK/Posing Nightmare

I'm fairly new to blender, and I've modeled plenty of low poly models.. but this is my first time attempting to rig anything. I've been following this great video tutorial step by step, but even ...
Emily the Penguin's user avatar
3 votes
2 answers
8k views

Worm/Tentacle/Tail/Spine Animation with ease

I wanted to rig and animate a worm using IK, so that if i move the tip of the tail i get the bend one would expect. Unfortunately using plain IK the tip will point towards the ground instead of ...
brunnerh's user avatar
  • 143
2 votes
2 answers
1k views

Bone shrinks mysteriously under the influence of an IK Constraint

I tried setting up inverse kinematics on a very simple test character rig and the bone went all crazy. It shrinks the leg to a stump when the IK Constraint's influence is at 1. I've set it to 0.5 so ...
Mentalist's user avatar
  • 19.3k
1 vote
0 answers
503 views

What are IK bones, and what do they do?

I've been following this tutorial series, and he uses IK bones and the other types of bones that I've forgotten the name of (edit: since remembered, 'pole target'), a controlling bone under the foot ...
Cubit's user avatar
  • 761
1 vote
2 answers
773 views

Fixing deformation due to IK bone constraint

I've been trying to use the IK Bone Constraint with my rigs as it makes animating much easier. However, I find that when I apply the constraint, I get twisting in ...
Hoklai's user avatar
  • 11
4 votes
1 answer
6k views

Enabling IK stretch in the IK Constraint does nothing?

Enabling IK stretch in the IK ConstraintS Stretch in the IK Constraint does nothing?
ashwin's user avatar
  • 1,749
1 vote
2 answers
220 views

Help with IK Rigging

I have IK rigged my model legs but this happens. we all know that it suppose to go forward not backwards. Can someone help me . Thanks ^_^
BryanO.Art's user avatar
9 votes
1 answer
45k views

How to IK rig legs

I have a simple character. I would like rig the legs so that I can easily control them. How can I IK rig my characters leg? .blend file
Vader's user avatar
  • 14.8k
1 vote
2 answers
2k views

Baking IK into FCurves

I have an object containing multiple models with several IK. One model has fcurves (euler rotation only) which gives motor to linked IK models. What I need is bake/convert all IK animations into ...
velkyel's user avatar
  • 13
0 votes
1 answer
4k views

Having trouble with IK bones

I'm new to Blender, and am trying to teach myself how to rig. I have a simple robot model with two arm bones and an IK bone on the hand to control the arm. The IK bone's Deform box is unchecked. I ...
shhh's user avatar
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