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Blender armature has bad bone rolls for Unreal Engine - Blender Development Discussion - Blender Artists Community
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Its impossible to recalculate bone roll of all bones if each bone has different roll? - Animation and Rigging - Blender Artists Community
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Blender 3D / rigging: How to adjust the roll of bones in a bones chain the proper way / HD - YouTube
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rigging - How do I set Roll=0 after setting a bone position/roll in edit mode - Blender Stack Exchange
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