Rigify IK stretches the limbs.super_limb if "IK Stretch" is disabled. IK-FK discrepancy. #84422

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Alexander · 2021-01-05T18:07:02+01:00

Alexander commented

2021-01-05 18:07:02 +01:00

System Information
Operating system: Windows 10
Graphics card: 1080ti

Blender Version
Broken: 2.9

Short description of error
limbs.super_limb is stretching/compressing when using IK with "IK Stretch" disabled. The problem is very noticeable when working with realistic characters. Such behaviour leads to a weird body deformities.

Exact steps for others to reproduce the error

In a new project: Add / Armature / Human (meta rig)
Generate Rig
In Pose Mode select foot_ik.L or foot_ik.R
Disable IK Stretch
Switch to Translation Tool and try to "stretch the limb"

Result: It stretches limb to some degree then stops.
Expected result: It should not allow any stretch.

**System Information** Operating system: Windows 10 Graphics card: 1080ti **Blender Version** Broken: 2.9 **Short description of error** **limbs.super_limb is stretching/compressing when using IK with "IK Stretch" disabled.** The problem is very noticeable when working with realistic characters. Such behaviour leads to a weird body deformities. **Exact steps for others to reproduce the error** 1. In a new project: Add / Armature / Human (meta rig) 2. Generate Rig 3. In Pose Mode select **foot_ik.L** or **foot_ik.R** 4. Disable **IK Stretch** 5. Switch to Translation Tool and try to "stretch the limb" Result: It stretches limb to some degree then stops. Expected result: It should not allow **any** stretch.

Alexander commented

2021-01-05 18:07:02 +01:00

Added subscriber: @alexander.ossur