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So, my problem is this: I started building an armature for a character to do a walk cycle with Blender. Now with X-Axis Mirror ticked, the bones are mirrored but they appear on the same side of the mesh. Here's a picture of the problem:

enter image description here

So, I tried extruding the shoulder bone with Shift + E, and this is how it turned out. Blender automatically names these bones as _L and _R, why are they mirrored on the same side?

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  • $\begingroup$ They are mirrored along -X/+X (in global coordinates). Blender handles bones mirroring along -X/+X only. So the problem is your character is rotated along Y axis. You should rotate your character 90° and preferably apply rotation on it (Ctrl+A then 'rotation'). More globally, rig with no rotation (either armature or obj) this is simpler. $\endgroup$ – lemon Apr 11 '17 at 12:46
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A more complete indication (than the comments):

Blender's convention for armature is mirroring along -X / +X axis.

  • -X is the right part of the character (on screen on the left when looking in front view)
  • +X is the left part (same principle)

To avoid complexity, it is good to rig your character using the same orientation and scale for both the armature and your character. And much preferably no rotation and no scale.

enter image description here

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