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I want to make a rectangle eyebrow for my character with specific controls, but I'm new to bendy bones and cant figure it out.

I want it to be a rectangle with 2 bones on each side that move each side of the rectangle while still keeping it straight, like this simple drawing I made.

enter image description here

in the drawing the two bones have moved but the cube (a line here) is still straight.

I also want to have a third bone in the middle which i can move to bend the line up or down in a nice curve. I think bendy bones are the best way to do this, but I cant figure out how to get this nice way of controlling it. Is this even possible?

enter image description here

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    $\begingroup$ maybe take a look at my answer here, I guess the Spline Ik is a bit painful but it's the solution that will give you the most control: blender.stackexchange.com/questions/116124/… $\endgroup$
    – moonboots
    Sep 13 '21 at 17:43
  • $\begingroup$ Im trying to follow it, but for the life of me I cant figure out how to select a bone, and then select the curve to hook the bone to it. I cant get it to work =( $\endgroup$
    – Millard
    Sep 13 '21 at 19:53
  • $\begingroup$ Select the bone you want in Edit or Pose mode, switch to Object mode, shift select the curve, select the vertex, press Ctrl H > Hook to Selected Object Bone $\endgroup$
    – moonboots
    Sep 13 '21 at 20:01
  • $\begingroup$ Another completely different solution would be to use shape keys, much simpler that all these solutions $\endgroup$
    – moonboots
    Sep 13 '21 at 20:02
  • $\begingroup$ yeah, that would probably be better for what I want to do, but like my first picture I want it to remain straight unless I am bending it down or up and I'm not sure how to rig the two bones controlling either end when the eyebrow has loop cuts. $\endgroup$
    – Millard
    Sep 13 '21 at 20:09

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