FBX Animation Export - Unexpected Rotations #80207

New Issue

Juan Pablo Riebeling · 2020-08-29T01:45:34+02:00

2020-08-29 01:45:34 +02:00

System Information
Operating system: Darwin-16.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon HD - FirePro D700 OpenGL Engine ATI Technologies Inc. 4.1 ATI-1.54.2

Blender Version
Broken: version: 2.83.5, branch: master, commit date: 2020-08-19 06:07, hash: blender/blender@c2b144df39
Worked: never for me

Short description of error
Exporting my FBX character animations generates unexpected rotations on bones that aren't even animated.

Exact steps for others to reproduce the error

Model, rig, and animate a character (everything in Quaternion WXYZ. No IKs, No other constraints).
Export as FBX (Tried a bunch of different stuff: swapping primary bone orientation, smaller/bigger sample sizes, less simplifying, leaf bones, etc. pretty much all checkbox configurations )
Reimport that FBX back into blender.
Play Animations. Some bones have an undesired rotations.

**System Information** Operating system: Darwin-16.7.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon HD - FirePro [D700](https://archive.blender.org/developer/D700) OpenGL Engine ATI Technologies Inc. 4.1 ATI-1.54.2 **Blender Version** Broken: version: 2.83.5, branch: master, commit date: 2020-08-19 06:07, hash: `blender/blender@c2b144df39` Worked: never for me **Short description of error** Exporting my FBX character animations generates unexpected rotations on bones that aren't even animated. **Exact steps for others to reproduce the error** - Model, rig, and animate a character (everything in Quaternion WXYZ. No IKs, No other constraints). - Export as FBX (Tried a bunch of different stuff: swapping primary bone orientation, smaller/bigger sample sizes, less simplifying, leaf bones, etc. pretty much all checkbox configurations ) - Reimport that FBX back into blender. - Play Animations. Some bones have an undesired rotations.

Juan Pablo Riebeling commented

2020-08-29 01:45:34 +02:00

Added subscriber: @jovenpaul

Juan Pablo Riebeling commented

2020-08-29 01:46:35 +02:00

Files For test

FBX Animation break.blend
Onion.fbx

Files For test [FBX Animation break.blend](https://archive.blender.org/developer/F8817956/FBX_Animation_break.blend) [Onion.fbx](https://archive.blender.org/developer/F8817962/Onion.fbx)

Ankit Meel commented

2021-04-18 13:57:03 +02:00

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

Ankit Meel commented

2021-04-18 13:57:03 +02:00

Added subscriber: @ankitm

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FBX Animation Export - Unexpected Rotations #80207