I was trying to get around an issue where I couldn’t apply a mirror mod because the mesh had shape keys, so I duplicated the object (1 half) in object mode, flipped it on the X axis, joined it in object mode then merged double verts. The mesh is fine and I even textured it BUT… This has resulted in one side of the armature controlling both sides of the mesh.
I made a copy of the mesh/armature before screwing this up so I have the weights/etc from that still, if I can use those somehow. Help me!