A couple of things to watch for.
1 the model should be centered over the center of the grid since the mirror function mirrors across the grid axis.
2 make sure you are mirroring across the right Axis
3 the model must be symetrical which should be your bind pose.
To mirror selected areas of your model instead of the whole skin
A) Hold your cursor over your bound skin and right click and select Control Vertex or Vertex.
B) select the vertices on the side from which you want to mirror from and afterward the vertices on the side you want to be mirrored to.
C) Now Select Skin > Edit Smooth Skin > Mirror Skin Weights option box and set your options.
D) click on Mirror.
2 x Modeling Challenge Winner
Last edited by jsprogg; 24-07-2008 at 12:36 PM.