Export to GLB - Shape Key new behavior Bug #98912
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Reference: blender/blender-addons#98912
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Operating system: Win10
Broken: 3.2
Worked: 3.1
All the following refers to the glTF export.
In 3.1, I could use a Bone to Drive a shape key that deformed my mesh. For the shapekey animation to be associated to the correct Action, the Shapekeyed mesh Had to be parented to a bone from the Armature or the armature itself.
GIF of modelviewer result
In 3.2, the mesh needs to be parented to the armature only, not one of its bone. If parented to a bone, the shapekey animation will not export correctly, altough in Blender, it seems to work (meaning result is identical to the 3.1 glTF result).
GIF of modelviewer result
I prefer the 3.1 behavior since it allows for more flexibility. If there is a workaround, I would really like to know it, I have a few projects that use the 3.1 method.
Added subscriber: @Patnard
Here is the file I used to make both GLB represented in the GIFs.
glTF Shapekey 3.2.blend
Also, here is the resulting GLBs
3.1:B3.1 Shape Key + glTF.glb
3.2:B3.2 Shape Key + glTF.glb
Confirmed.
Proposed fix PR here: https://github.com/KhronosGroup/glTF-Blender-IO/pull/1667
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @PratikPB2123
@JulienDuroure, I've not tested this myself (both fix and original bug report).
If this is a regression and you think fix would not break anything then please mention this fix for corrective release blender/blender#98661
This issue was referenced by
bc44a075d1This issue was referenced by
aa353e127cChanged status from 'Confirmed' to: 'Resolved'
@JulienDuroure I encountered a different bug, linked to this one in the way that it's about bone parenting. I wanted to report it, but I was wondering if your recent fix, fixed it. I tried with blender-3.2.1-candidate+v32.cfc6eb739138- 28 june and the bug is present, in a way that it was not in 3.1.1. Is this version using your changes about parenting?
@Patnard Yes, this fix is on build you tried.
Please create a bug report with your test case on upstream repo/bug tracker : https://github.com/KhronosGroup/glTF-Blender-IO/issues