Blender Arm Rigging: IK & FK Setup – Plus Stretching Bones


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Hello there,

In this how to rig an arm tutorial, I will go over my method for rigging an arm in Blender. I will talk about how to create an IK / FK switch, and also how to make the arm bend like a cartoon (this one will work in both IK and FK modes!). I put a lot of effort into making this tutorial; I know that at this point it is clear that making tutorials is not my forte, but hey! I do it for you guys ;). My English was going downhill when I was making it, so I had to edit and cut out a lot of junk from it :|. Hopefully it is easy to understand, but if not, like I always say, ask me questions and I’ll do my best to get back to you as soon as possible.

Thank you for watching!

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44 responses to “Blender Arm Rigging: IK & FK Setup – Plus Stretching Bones”

  1. Great video indeed. I just wonder which is the use for half of the tutorial. It seems to me i can do the same with the techniques shown in the first half of the video as the whole video. All the IKs are really making an efficient difference? Programmable bone for video games?

  2. Great fucking video, man! But I got a question . . . when you stretch the hand (arm) IK, only the wrist area stretches. How would you make the whole arm stretch along with it (to exaggerate the cartoony effect)?

  3. Thank you very much my friend! It helps me alot to complete an elastic girl character I made, Great tutorial very good explained and easy to follow. Many Blessings! and awesome work. Greetings from Colombia!

    ¡Muchas gracias amigo! Me ayudo mucho para completar un personaje elástico de chica que hice, un gran tutorial muy bien explicado y fácil de seguir. ¡Muchas bendiciones! Tu trabajo es impresionante. ¡Un saludo desde Colombia!

  4. One thing I usually need is to at some point tell my FK bones to match the IK bones position and rotation (or vice versa), since I'd be usually switching them around at some point in the animation. I never understood why tutorials about rigging in Blender don't mention this important step. That's usually done via scripting though, easy to do.

  5. I had always figured the deforming bones were themselves the FK bones. Why do you create separate bones for FK? Is it just to allow for the subdivided deform bones, or do things go wrong when using the deform bones as FK bones?

  6. I know it was pretty long ago, but I have an issue… In 31:57 you check all IK bones and each of them has to have "influence" set on 0, but… in my case arm_IK has 0 value, but forearm_IK and hand_IK have 1 in "influence". Well, I'm into Blender for ten days, so I'm totally new in it, please help me what can be a reason.

  7. I have this weird little problem, I applied copy rotation and location constraint to the hand ik. But at the end of the day, that little hand ik bone doesn't copies location from the hand fk bone although it does copies rotation of the hand fk bone.

    My question: is that hand ik bone needs to be parented with something? or have i done something wrong?

  8. hello sir. how can i connected two objects on one IK on the same armature?
    my problem is i have 2 objects, arm and hand. than i parent it into one IK. but when i stretch out the IK, that hand follow the IK and leave the arm. i want my hand and arm still connected when i strecth out my IK controller.
    thx

  9. Great and easy to understand tutorial, thanks
    I have a few more advanced rig tools but they are more complicated to use and it always feel like i waste time using them.. what you have made here feels more direct and fun to use and i will start to use these ideas for my rigs. One thing 2 of my more advanced rig tools have is "Snap to IK / Snap to FK target" and now i just realized what they're intended to do..lol.
    Will try to add that to this arm-rig.
    Keep to good work up.
    Cheers

  10. Great tutorial! I can't wait to put it to use. You said in the comments that you personally don't like using sliders. How would you control the switching from the main rig if this was part of an entire character rig?

  11. how DO I GET IN FREAKING EDIT MODE U DDIDNT SHOW US THAT PART
    how do you turn the hand invisible you didnt show that part too for god sake
    how do u grow extra bones for god sake so frustrating what kind of tutorial is this

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