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So as you all might know, Blender recently released an official free character rig "Snow" that can help you gain animation skills. And everything seems good except for the FK arm rigs and leg rigs. The middle stomach FK rig doesn't work either. The IK rig works fine but I can't figure out what's wrong. so here you can see I have his torso selected

So in this picture you see I have his torso rig selected right? enter image description here and the the character's torso moves with the rig.

enter image description here but look at the arm... enter image description here And notice the arm itself doesn't move with the rig at all. enter image description here nor do the legs. enter image description here and the belly (above the torso) doesn't work either. enter image description here

Please oh please help!!!

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  • $\begingroup$ Is the rig the CloudRig of Ellie? ... oh! nevermind, it is. $\endgroup$
    – Blunder
    Apr 23, 2022 at 19:28

2 Answers 2

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First, Focus on the "FK/IK Switch" panel of the CloudRig settings tab:

FK/IK Switch panel

Each of the five switches are meant to be toggles with 0 meaning "use FK" and 1 meaning "use IK"; although, as this answer points out, they are actually implemented as "influence" so that you could have a rig that's partially controlled by each. (Don't try this at home.)

Anyway, you have the values all set to 1, meaning that Blender is ignoring the IK rig in each case. For FK set them to 0.

Setting Spine, Left Arm, and Right Arm to 0 will give you FK control, including the Rib Cage.

There's one other thing to know about using the FK rig. Open the FK panel. It will look something like this:

FK panel

Those values are also "Influence" values, and they're to help animators. Take the Head value. If you leave it at zero when you rotate the Rib cage control, the head will stay at the same angle on the neck, bending with the rig. Sometimes you don't want that. If you change it to one, the head will hold it's angle as it moves. (It makes more sense if you experiment with it than it will from this description.)

Anyway, the whole point of these things is to make the animator's job easier. Sometimes it's easier to position an arm or leg by using IK, other times not. Sometimes you want the head to move with the torso, sometimes not. The various switches and influences are to give you that control.

(An example with the head. Suppose you rotate the torso on the Z axis. Maybe you want the head to keep looking at the same point, so you set head hinge to 1. Sometimes you want to move the torso to help move the head so you set head hinge to 0.

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  • $\begingroup$ Thank you so so so much man! ๐Ÿ™๐Ÿ™๐Ÿ™๐Ÿ™๐Ÿ™๐Ÿ™๐Ÿ™You just made my day! $\endgroup$
    – sean
    Apr 24, 2022 at 17:31
  • $\begingroup$ @sean you are very welcome. $\endgroup$ Apr 24, 2022 at 17:40
  • $\begingroup$ do you know how to make both fk and ik work? $\endgroup$
    – sean
    May 1, 2022 at 17:46
  • $\begingroup$ @sean You can't use both at once. However rigify does have an IK/FK "snapping" switch that will cause IK bones to snap tp the current FK or vice versa, so you can can work with IK for a while, snap the FK bones into place, turn the switch to FK and then use the FK bones. I'm not sure how the CloudRig variant works, but I think its the buttons that look like two circular arrows. $\endgroup$ May 1, 2022 at 19:49
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The CloudRig is a featureset for Rigify. Like the Rigify rig, it has a few settings to switch between FK and IK controls. The switches for the legs are called Settings > FK/IK Switch > Left Thigh and ... > Right Thigh and are on the CloudRig tab in the side panel (N) of the 3D viewport. There are also Left UpperArm and Right UpperArm for the arms.

Example:

  • FK (value 0) -> the leg is extended horizontally
  • IK (value 1) -> the knee is raised and the leg is bent

With the "circle-arrows" icon, you can snap the FK controls to IK controls and vice versa.

FK/IK switch

(Ellie you can get from blender.org as Pose Library. If Blender freezes when you open the blend file then use File > Append... to add the CH-ellie.* collection(s) to a new blend file. Don't forget to enable Rigify and to install the CloudRig. Run cloudrig.py on the Scripting workspace to add the buttons in the N-panel.)

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