Basis shape key not behaving as expected #88759

New Issue

Luke Costello · 2021-06-02T23:32:28+02:00

Luke Costello commented

2021-06-02 23:32:28 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
Worked: (newest version of Blender that worked as expected)

Short description of error
Strange behavior related to basis of shape keys. When exporting this mesh it exports it as though "out" is the basis shape key. When you hit "+" to add a shape key it is by default the "out" shape key even though "out" is not the basis.

Exact steps for others to reproduce the error
just press "+" to add a shape key or export as gltf2 (probably other templates as well)
outercorners.zip

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` Worked: (newest version of Blender that worked as expected) **Short description of error** Strange behavior related to basis of shape keys. When exporting this mesh it exports it as though "out" is the basis shape key. When you hit "+" to add a shape key it is by default the "out" shape key even though "out" is not the basis. **Exact steps for others to reproduce the error** just press "+" to add a shape key or export as gltf2 (probably other templates as well) [outercorners.zip](https://archive.blender.org/developer/F10154963/outercorners.zip)

Luke Costello commented

2021-06-02 23:32:28 +02:00

Added subscriber: @lukostello

Philipp Oeser commented

2021-08-20 13:15:44 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-08-20 13:15:44 +02:00

Can confirm in this particular file.

Similar to #67185 (Shape Keys Behaving Like a Duplicate of Previous Key ), I assume there have been modeling modifications on the mesh after adding the shapekey(s) that changed vertex count / topology?

This only has limited support and can lead to some issues, see the above report as well as https://blender.stackexchange.com/questions/19296/can-i-fix-broken-shape-keys-after-editing-basis.

That being said, you can fix this in you case by:

open your file
select OuterCorners object
enter editmode
select all vertices
select the Basis shapekey
from the menus, execute Vertex > Blend from Shape

If I do this, I can create a new shapekey that doesnt seem like a duplicate of the other shapekey...

Will merge this into #67185 [which has been closed for now because it is working as intended (even though this could be really improved upon...)]

Can confirm in this particular file. Similar to #67185 (Shape Keys Behaving Like a Duplicate of Previous Key ), I assume there have been modeling modifications on the mesh after adding the shapekey(s) that **changed vertex count / topology**? This only has limited support and can lead to some issues, see the above report as well as https://blender.stackexchange.com/questions/19296/can-i-fix-broken-shape-keys-after-editing-basis. That being said, you can fix this in you case by: - open your file - select `OuterCorners` object - enter editmode - select all vertices - select the Basis shapekey - from the menus, execute `Vertex` > `Blend from Shape` If I do this, I can create a new shapekey that doesnt seem like a duplicate of the other shapekey... Will merge this into #67185 [which has been closed for now because it is working as intended (even though this could be really improved upon...)]

Philipp Oeser commented

2021-08-20 13:15:55 +02:00

Closed as duplicate of #67185

Philipp Oeser closed this issue

2021-08-20 13:15:55 +02:00

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Basis shape key not behaving as expected #88759