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FBX export animations for non-animated objects when All Actions is enabled #100366

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opened 2022-08-12 09:26:34 +02:00 by Reiner Prokein · 6 comments
Reiner Prokein commented 2022-08-12 09:26:34 +02:00
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Simplified Report

The following file contains an object with no animations. Exporting the object with All Actions enabled and importing it again will assign an action to it.
This is most likely due to the fact that animation_data is not None in the object, but animation_data.action is None.

aniproblem1.blend

Original Report

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-01 01:02, hash: blender/blender@6749a4a8f0

Short description of error
Exporting a mesh as fbx and reimporting it creates keyframes

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

  • Open the attached file
  • export the content as fbx
  • reimport the content as fbx
  • Watch the keyframes

I have no idea how i managed to show this behaviour. It just happened to two meshes in my scene. The other dozens of objects in the scene exported and imported just fine.

aniproblem1.blend

2022-08-12 09-20-09.mp4

### Simplified Report The following file contains an object with no animations. Exporting the object with All Actions enabled and importing it again will assign an action to it. This is most likely due to the fact that `animation_data` is not `None` in the object, but `animation_data.action` is `None`. [aniproblem1.blend](https://archive.blender.org/developer/F13368958/aniproblem1.blend) ### Original Report **System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15 **Blender Version** Broken: version: 3.4.0 Alpha, branch: master, commit date: 2022-08-01 01:02, hash: `blender/blender@6749a4a8f0` **Short description of error** Exporting a mesh as fbx and reimporting it creates keyframes **Exact steps for others to reproduce the error** [Please describe the exact steps needed to reproduce the issue] [Based on the default startup or an attached .blend file (as simple as possible)] - Open the attached file - export the content as fbx - reimport the content as fbx - Watch the keyframes I have no idea how i managed to show this behaviour. It just happened to two meshes in my scene. The other dozens of objects in the scene exported and imported just fine. [aniproblem1.blend](https://archive.blender.org/developer/F13368958/aniproblem1.blend) [2022-08-12 09-20-09.mp4](https://archive.blender.org/developer/F13368953/2022-08-12_09-20-09.mp4)
Reiner Prokein commented 2022-08-12 09:26:34 +02:00
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Added subscriber: @tiles

Added subscriber: @tiles
Omar Emara commented 2022-08-16 13:03:05 +02:00
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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
Omar Emara changed title from FBX export creates keyframes to FBX export animations for non-animated objects when All Actions is enabled 2022-08-16 13:07:13 +02:00
Bastien Montagne commented 2022-10-07 11:44:02 +02:00
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Added subscriber: @mont29

Added subscriber: @mont29
Bastien Montagne commented 2022-10-07 11:44:02 +02:00
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Changed status from 'Confirmed' to: 'Archived'

Changed status from 'Confirmed' to: 'Archived'
Bastien Montagne commented 2022-10-07 11:44:02 +02:00
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I would not consider this as a bug, even if your object has no animdata at all, it may be indirectly animated in Blender (through constraints e.g.), so we need to bake it anyway...

I would not consider this as a bug, even if your object has no animdata at all, it may be indirectly animated in Blender (through constraints e.g.), so we need to bake it anyway...
Reiner Prokein commented 2022-10-07 12:27:26 +02:00
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Sometimes i don't understand how you define a bug. The scene is clearly broken by this behaviour. There is no animation, there is no constraint. So why do you want to bake what does not exist?

Anyways, it's of course your decision. I can just report it.

Sometimes i don't understand how you define a bug. The scene is clearly broken by this behaviour. There is no animation, there is no constraint. So why do you want to bake what does not exist? Anyways, it's of course your decision. I can just report it.
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Reference: blender/blender-addons#100366
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