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Spine volume attribute

I have a question while looking at the “https://github.com/mgear-dev/Data-centric_rigging_sample_data” rigs/girl_Outfit_C_film.ma

When stretching the spine, adjusting the volume-adjusting approach can break the shape of the head.

When I looked at it, it didn’t seem to be a skinning problem.

When I didn’t use mgear, I saw a problem similar to this, but I didn’t know why.

Do you have any video or explanation related to this?

volume on

volume off

hello @1114

May I know the maya version that you are using?
Some 2019 version had deactivated the shear attr in joints.

I am using Maya 2019.2 version.
shear attr means Segment Scale Compensate attr?

no is not the same. Shear is a plug attr. You can see it on the node editor if you check the joint inputs

and yes! the issue is your Maya version. Please update to the latest 2019 update or use 2020 or 2018 :wink:

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Thank you. it’s ok at 2020

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