Blend from Shape not working #95747

New Issue

Guilherme · 2022-02-13T16:05:02+01:00

Guilherme commented

2022-02-13 16:05:02 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.09

Blender Version
Broken: version: 3.0.1, branch: master, commit date: 2022-01-25 17:19, hash: dc2d180181
Worked: (newest version of Blender that worked as expected)

Short description of error
Whenever I modify the 'basis' shape key, select the vertices I have changed and try the "blend from shape" operator it does nothing. Any other shape key, when applied, makes the modified vertices go to the original position. The "propagate to shapes" operator is flawless, always works, but it has the inconvenience of destroying the other shape keys on the applied area, and thus could only be applied on areas untouched by any shape key.

Exact steps for others to reproduce the error

I change the vertices positions of a mesh in the 'basis' shape key slot (the mesh has other shape keys already made).
I select all the vertices which have been position transformed and select 'vertex >blend from shape'. I doesnt't work.
OBS: I suspect there is something to do with areas that already have other shape keys applied, for areas without intervention the 'blend from shape' works similarly to 'propagate to shapes'. One othe robservation is that almost all my shape keys have drivers applied to them.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.09 **Blender Version** Broken: version: 3.0.1, branch: master, commit date: 2022-01-25 17:19, hash: `dc2d180181` Worked: (newest version of Blender that worked as expected) **Short description of error** Whenever I modify the 'basis' shape key, select the vertices I have changed and try the "blend from shape" operator it does nothing. Any other shape key, when applied, makes the modified vertices go to the original position. The "propagate to shapes" operator is flawless, always works, but it has the inconvenience of destroying the other shape keys on the applied area, and thus could only be applied on areas untouched by any shape key. **Exact steps for others to reproduce the error** - I change the vertices positions of a mesh in the 'basis' shape key slot (the mesh has other shape keys already made). - I select all the vertices which have been position transformed and select 'vertex >blend from shape'. I doesnt't work. OBS: I suspect there is something to do with areas that already have other shape keys applied, for areas without intervention the 'blend from shape' works similarly to 'propagate to shapes'. One othe robservation is that almost all my shape keys have drivers applied to them.

Guilherme commented

2022-02-13 16:05:02 +01:00

Added subscriber: @Yerus_Ovelha

Philipp Oeser commented

2022-02-14 09:51:34 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-02-14 09:51:34 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2022-02-14 09:51:35 +01:00

Do you have Add unchecked? Value set to 1?

Have you used Undo in the process? (then you might have been bitten by #44415 (Shape keys get out of sync with Basis shape (when using UNDO in basis modification or manipulating basis via python)))

Does this happen on the Default Cube? Or just a particular file? (Please share an example .blend file then)

Do you have `Add` unchecked? Value set to 1? ![image.png](https://archive.blender.org/developer/F12866357/image.png) Have you used Undo in the process? (then you might have been bitten by #44415 (Shape keys get out of sync with Basis shape (when using UNDO in basis modification or manipulating basis via python))) Does this happen on the Default Cube? Or just a particular file? (Please share an example .blend file then)

Guilherme commented

2022-02-14 21:10:21 +01:00

So, in summary, it's forbidden using undo while editing basis shape key, right?