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Rigging: The foot bone IK generated by the rigify plugin has a distortion problem.
Open, Needs Triage by DeveloperPublic

Description

System Information
Operating system: Windows-10-10.0.19002 64 Bits
Graphics card: Radeon RX550/550 Series ATI Technologies Inc. 4.5.13571 Core Profile Context 19.10.1 26.20.13025.10004

Blender Version
Broken: version: 2.80~2.82 (sub 1), branch: master, commit date: 2019-10-23 16:40, hash: rB9aa1bb6388ac
Worked: (optional)

Rigging: The foot bone IK generated by the rigify plugin has a distortion problem.
I recorded a video to reproduce the problem I encountered.
Error scenarios can be downloaded for attachment viewing.

Details

Type
Bug

Event Timeline

If by "distortion" you mean that the knee bends backwards, than it's probably because the knee in your armature is like this:


when it should bend slightly forwards:

https://blenderartists.org/t/direction-of-knee-is-not-right-when-bending/685229/2