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USD exports point cache instead of UsdSkelAnim #108325

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opened 2023-05-26 18:12:34 +02:00 by Thomas Kumlehn · 5 comments
Thomas Kumlehn commented 2023-05-26 18:12:34 +02:00
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System Information
Operating system: macOS 13.4 (22F66)
Graphics card: M1 16 GB

Blender Version
Broken: 4.0.0 alpha, 3.6 beta, 2.93
Worked: unknown/never

Short description of error

  • Export as USD (produces baked points per keyframe, but no UsdSkelAnim)
  • Export as glTF and use external converter to USD (keeps Skeleton)

Exact steps for others to reproduce the error

  • Open attached .blend
  • Export as USD (Animation checked, w/ or w/out Normals)
**System Information** Operating system: macOS 13.4 (22F66) Graphics card: M1 16 GB **Blender Version** Broken: 4.0.0 alpha, 3.6 beta, 2.93 Worked: unknown/never **Short description of error** - Export as USD (produces baked points per keyframe, but no UsdSkelAnim) - Export as glTF and use external converter to USD (keeps Skeleton) **Exact steps for others to reproduce the error** - Open attached .blend - Export as USD (Animation checked, w/ or w/out Normals)
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 labels 2023-05-26 18:12:34 +02:00
Thomas Kumlehn commented 2023-05-26 18:13:26 +02:00
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Forgot the 4.0.0 alpha scene file

Forgot the 4.0.0 alpha scene file
RocketTest_SkelAnim.blend
1.1 MiB
Richard Antalik commented 2023-05-27 07:10:04 +02:00
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@makowalski I saw you are active in this area. I assume this is not implemented yet. Are there any plans to implement this feature?

@makowalski I saw you are active in this area. I assume this is not implemented yet. Are there any plans to implement this feature?
Thomas Kumlehn commented 2023-05-27 07:28:13 +02:00
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I tested with 4.0.0 Alpha "universal-scene-description" and the animation is exported as UsdSkelAnim as expected, but something related to metersPerUnit, xformOps or Axis seems to be incompatible to my existing ways to view USD assets (Finder/Preview/RealityConverter/RealityComposer).

I tested with 4.0.0 Alpha "universal-scene-description" and the animation is exported as UsdSkelAnim as expected, but something related to metersPerUnit, xformOps or Axis seems to be incompatible to my existing ways to view USD assets (Finder/Preview/RealityConverter/RealityComposer).
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 labels 2023-05-27 07:28:17 +02:00
Michael Kowalski commented 2023-05-28 23:13:05 +02:00
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@makowalski I saw you are active in this area. I assume this is not implemented yet. Are there any plans to implement this feature?

Yes, USD skeleton and blend shape animation IO is implemented in the universal-scene-description branch, and the plan is to port this feature into the main branch for Blender 4.0.

> @makowalski I saw you are active in this area. I assume this is not implemented yet. Are there any plans to implement this feature? Yes, USD skeleton and blend shape animation IO is implemented in the `universal-scene-description` branch, and the plan is to port this feature into the `main` branch for Blender 4.0.
Michael Kowalski commented 2023-05-28 23:14:59 +02:00
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I tested with 4.0.0 Alpha "universal-scene-description" and the animation is exported as UsdSkelAnim as expected, but something related to metersPerUnit, xformOps or Axis seems to be incompatible to my existing ways to view USD assets (Finder/Preview/RealityConverter/RealityComposer).

Hi @pixelpartner I'm sorry the skeleton IO did not work as expected in the universal-scene-description branch. I will test with your attached example blend file to try to reproduce the issue.

> I tested with 4.0.0 Alpha "universal-scene-description" and the animation is exported as UsdSkelAnim as expected, but something related to metersPerUnit, xformOps or Axis seems to be incompatible to my existing ways to view USD assets (Finder/Preview/RealityConverter/RealityComposer). Hi @pixelpartner I'm sorry the skeleton IO did not work as expected in the `universal-scene-description` branch. I will test with your attached example blend file to try to reproduce the issue.
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Reference: blender/blender#108325
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