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If I export an armature as bvh and then import it back, the imported armature doesn't look anything like the original.

Could anyone please have a look and advise?, blend file

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  • $\begingroup$ Is the animation correct? $\endgroup$ – ideasman42 Mar 28 '15 at 13:26
  • $\begingroup$ @ideasman42 what do you mean? this file is just an example. My original file has different animation but have the same issue. $\endgroup$ – Tak Mar 28 '15 at 13:29
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The BVH format stores bones differently to Blender.

Specifically, it doesn't support bone-length and bone-roll, each bone is just a joint
(as if you have many parented empties in Blender), so this information is lost on export, when the BVH is imported back in, the animation will match the original, but not the armature.

The bone lengths & roll have to be calculated on import (because its not in the file).

This is simply a limitation of the BVH format, or a difference at least, with Blender's armature representation.

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