How to rig a cartoony tentacle in Unreal Control Rig (stretch & bend) ?

Mameeyo
Fri, 12 Sep 2025 18:11:52 +0000
Character & Animation

Hello everyone!
I’m trying to rig my character in Unreal Engine using Control Rig.

The character has tentacles that need to stretch in length and bend into a shape similar to the letter C….
Right now, I’m trying to solve this using Spline IK, but it hasn’t been very successful - the controls fly off somewhere during tentacle deformation, and the mesh seems to turn inside out when bending… Stretching in length works well, but problems start when bending. Sometimes, when bending upwards, everything breaks easily, while bending downwards works quite well without the mesh breaking.

I’d like to set up a system similar to deforming a bone chain based on a Bezier curve, with two control points and dynamic handle lengths to adjust the curvature.

Is this possible? There are tons of tutorials about human rigs online, but almost nothing on such cartoony, unrealistic deformations…
I’d like to move my character animation workflow from Blender to Unreal, so I’m very interested in solving this problem.

I’d be really grateful for any advice. I’m a newbie

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