Armature animation differs when isolating a channel depending on which frame the isolation happened #98794

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opened 2022-06-11 16:56:26 +02:00 by Eric · 13 comments

Given the following file with three NLA channels. The resulting animation is different when isolating one of the channels depending on which frame the isolation took place.

Push Down bug.blend

To reproduce:

  • Open the file.
  • Isolate NlaTrack (Press star on the first NLA channel.)
  • Play animation, notice how the legs don't move.
  • Close and reopen file again.
  • Go to frame 50. (Or any other frame that intersects the second track.)
  • Isolate NlaTrack (Press star on the first NLA channel.)
  • Play animation, notice how the legs move as expected.

Original Report:

System Information
Operating system: Both occurred: Linux Pop OS, Windows 10 64
Graphics card: Linux GTX 1080, Win RTX 3070

Blender Version
Broken: 3.2.0
Worked: Unknown

Short description of error
Push Down function in the NLA track panel corrupts the animation, makes a random mess, but works correctly when you use Push Down in the action editor.

Exact steps for others to reproduce the error
I took a mocap made into an NLA track, then I make new keyframes to adjust it, then I baked the animation, next step I use the Push Down button in the NLA track and noticed that my entire animation changed into a mess, about 80 keyframes. I UNDO till it goes back to keyframes, this time I use Push Down in the Action Editor and that gives me the desired effect. More than once now using the push down in the NLA editor ruined many animations. This also occurred using Rigify.

Given the following file with three NLA channels. The resulting animation is different when isolating one of the channels depending on which frame the isolation took place. [Push Down bug.blend](https://archive.blender.org/developer/F13219248/Push_Down_bug.blend) To reproduce: - Open the file. - Isolate NlaTrack (Press star on the first NLA channel.) - Play animation, notice how the legs don't move. - Close and reopen file again. - Go to frame 50. (Or any other frame that intersects the second track.) - Isolate NlaTrack (Press star on the first NLA channel.) - Play animation, notice how the legs move as expected. **Original Report:** **System Information** Operating system: Both occurred: Linux Pop OS, Windows 10 64 Graphics card: Linux GTX 1080, Win RTX 3070 **Blender Version** Broken: 3.2.0 Worked: Unknown **Short description of error** Push Down function in the NLA track panel corrupts the animation, makes a random mess, but works correctly when you use Push Down in the action editor. **Exact steps for others to reproduce the error** I took a mocap made into an NLA track, then I make new keyframes to adjust it, then I baked the animation, next step I use the Push Down button in the NLA track and noticed that my entire animation changed into a mess, about 80 keyframes. I UNDO till it goes back to keyframes, this time I use Push Down in the Action Editor and that gives me the desired effect. More than once now using the push down in the NLA editor ruined many animations. This also occurred using Rigify.
Author

Added subscriber: @JJLee

Added subscriber: @JJLee
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Added subscriber: @lichtwerk

Added subscriber: @lichtwerk
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Changed status from 'Needs Triage' to: 'Needs User Info'

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

Can you share the .blend file prior to the pushdown for us to reproduce?

Can you share the .blend file prior to the pushdown for us to reproduce?
Author

With the Push Down button, sometimes it fails, sometimes it works. I bake the run, select all bones, in Bake, only check bake selected bones, it bakes into a run, I push down animation it stays as a run, other times the legs change into IK mode and it runs like its legs are tied.

But not all the time.
Push Down bug.blend

With the Push Down button, sometimes it fails, sometimes it works. I bake the run, select all bones, in Bake, only check bake selected bones, it bakes into a run, I push down animation it stays as a run, other times the legs change into IK mode and it runs like its legs are tied. But not all the time. [Push Down bug.blend](https://archive.blender.org/developer/F13219248/Push_Down_bug.blend)
Member

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

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

Added subscriber: @OmarEmaraDev

Added subscriber: @OmarEmaraDev
Member

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

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

Are you sure the issue is in the Push Down operator? I can see the tied legs issue, but immediately after baking without the need to push down, so it seems baking is the issue here? Can you confirm that?

Are you sure the issue is in the Push Down operator? I can see the tied legs issue, but immediately after baking without the need to push down, so it seems baking is the issue here? Can you confirm that?
Author

The random effects are baking related. Once it will do it correctly undo and bake again identically and results changes.

The random effects are baking related. Once it will do it correctly undo and bake again identically and results changes.
Member

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

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

Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
Member

I can replicate the issue even without baking, but haven't got a clue on why the issue happens. To reproduce:

  • Open the file.
  • Isolate NlaTrack (Press star on the first NLA channel.)
  • Play animation, notice how the legs don't move.
  • Close and reopen file again.
  • Go to frame 50. (Or any other frame that intersects the second track.)
  • Isolate NlaTrack (Press star on the first NLA channel.)
  • Play animation, notice how the legs move as expected.

So the only thing that changed was the frame at which the channel was isolated and the result is different.

I can replicate the issue even without baking, but haven't got a clue on why the issue happens. To reproduce: - Open the file. - Isolate NlaTrack (Press star on the first NLA channel.) - Play animation, notice how the legs don't move. - Close and reopen file again. - Go to frame 50. (Or any other frame that intersects the second track.) - Isolate NlaTrack (Press star on the first NLA channel.) - Play animation, notice how the legs move as expected. So the only thing that changed was the frame at which the channel was isolated and the result is different.
Omar Emara changed title from Push Down function behaves differently in Action Editor to NLA panel. to Armature animation differs when isolating a channel depending on which frame the isolation happened 2022-07-05 13:43:06 +02:00
Philipp Oeser removed the
Interest
Animation & Rigging
label 2023-02-09 14:34:49 +01:00
Christoph Lendenfeld added
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and removed
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labels 2023-10-31 16:26:43 +01:00
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Reference: blender/blender#98794
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