Node Tool deletes Shape Keys #113662
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Reference: blender/blender#113662
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System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1650/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.42
Blender Version
Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-11 23:03, hash:
67e4af3ea1cbWorked: (newest version of Blender that worked as expected)
Short description of error
Exact steps for others to reproduce the error
Note that all Shape Keys are destroyed.
I'm not sure if you can see video I uploaded but I can't. This has been issue on this website for quite a while now and I keep mentioning it. Please somebody fix it, it's very hard to report bugs like this.
https://imgur.com/Sh2Tb4d
I think it's an issue with the video file. After downloading it locally, it does not open in Chrome, Firefox or Quicktime Player here, but it does open in VLC.
Thank you for the report. I can confirm and have edited the description to make it clearer.
This will depend on the node tree in the end, but a basic node tree that doesn't do anything shouldn't remove shape keys. And ideally it would be reported to the user when it happens.
Looking into this a bit more, I think it is a known issue in the end. But I'll look into adding a warning to tell users about it anyway.
The problem is that node tools currently work on "evaluated" copies of objects, and shape keys are stored entirely differently for evaluated data-blocks.
@HooglyBoogly so I'm assuming that means if (please Hans) shape keys are just regular attributes, node tools will still not affect them since they act like modifier, and best we can hope for is to not delete them? I think that's fair and expected. Affecting shape keys isn't something I want to do anyway (or affecting vertex count), but shape keys not getting removed when node tool is used would be nice.
If shape keys were regular attributes, that would work. But they're far from it currently, unfortunately. Shape key data arrays are stored in a separate
Keydata-block. During depsgraph evaluation the active shape key is processed, but nothing else.There seems to be wide agreement that the shape key design is bad nowadays. The Blender studio even uses geometry nodes instead sometimes, for compatibility with library overrides I think. So I don't think shape key storage is on my "refactor" list unfortunately.
A more likely change is using original data-blocks in node tools instead. That would at least increase the number of supported nodes (from 0!) to include nodes like "Set Position" that don't change topology. And it may also significantly improve performance for node tools.
Well as facial animator that just killed something inside me, but maybe light shines one day on shape keys and Key data-block can be rested in piece!
Even though I would find that useful personally, I wouldn't spend my time on that if I were you. Shape Keys create such a terrible headache for animation (and new anim data block), as well as sculpting and multi-res that its only a matter of time till bigger design is needed.