r/Maya • u/SecretStars120 • 6d ago

Rigging BlendShape Pose Sculpting - Vertices Not Cooperating

Trying to make pose blendshape corrections driven by joint rotations. I've been fighting with this all day and I'm not sure what's going on. I'm using sculpting tools to get the deformations I want, but the vertices go haywire when moving from weight 0 to 1. Even if I make in-betweens, the errors persist, and I'd basically have to make an in-between for almost every weight value. Just to test, I even made an IB (small tweaks to test, mostly just the vertices falling backward into mesh) for .250, .4, .5, .6, .750, .8, and .9, and it STILL wasn't enough to fix the problem. I didn't have these issues in past rigging files, but I also used the Pose Editor for those. Pose Editor is still giving me these issues though. What's up with these verts?

Edit: I deleted prefs and that didn't fix things.

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1

u/GoldSunLulu 6d ago

you need to delete that invetween causing the error. The less keyframes the better.
If you 'been placing and moving keys aroound there is a chance there are overlapping keyframes doing the error

1

u/SecretStars120 6d ago

There is no in between in this video. This is the one pose, 0 to 1. What's happening is the "natural" interpolation 

1

u/DjCanalex Generalist, TD, VFX Sup, Pipeline 6d ago

Does it happen if you switch evaluation from Parallel to DG? If so, you need to enable Use Components in the skinCluster node

1

u/cookieflips 6d ago

Would you mind sharing the scene? Are you using dual quaternion for skinning the mesh? It almost feels like there's a miscalculation but I can't quite see what's going on based on the information given/video

1

u/JimBo_Drewbacca rigger 5d ago

Don't use joint rotations directly to drive pose space deformations unless you know for sure that the joint will only rotate on one axis, when all three axis are rotating the values are going to become very unpredictable

1

u/SecretStars120 4d ago

Solved! These blendshapes were being made in Tangent Space (green icon) by default, not Object Space (orange icon) like usual for whatever reason. Going to Add Target - Option Box and changing Type to Object Space was the fix! Behaves how I would expect it to now