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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6
votes
2answers
10k 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 ...
2
votes
1answer
353 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 ...
0
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1answer
807 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 ...
1
vote
1answer
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 ...
1
vote
2answers
521 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 ...
3
votes
1answer
718 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 ...
1
vote
0answers
141 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
2
votes
1answer
3k 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 .
0
votes
0answers
650 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, ...
0
votes
1answer
518 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.
3
votes
1answer
505 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 ...
1
vote
1answer
538 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..
2
votes
1answer
1k 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 ...
1
vote
1answer
965 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 ...
2
votes
1answer
125 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. ...
1
vote
1answer
672 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 ...
1
vote
1answer
883 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/...
0
votes
2answers
3k 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 ...
0
votes
2answers
951 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 ...
2
votes
2answers
7k 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 ...
2
votes
2answers
949 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 ...
1
vote
0answers
314 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 ...
4
votes
1answer
4k views

Enabling IK stretch in the IK Constraint does nothing?

Enabling IK stretch in the IK ConstraintS Stretch in the IK Constraint does nothing?
1
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2answers
209 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 ^_^
7
votes
1answer
41k 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
0
votes
2answers
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 ...
0
votes
1answer
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 ...

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