Aid in the process of creating morph targets for meshes (poly and trimesh).
BS Editor: The Transmographier is a modifier that aids in the process of creating Morph targets for meshes (poly and trimesh). Rather than cutting, mirroring and welding the mesh as with the Symmetry modifier, it matches positions of existing vertices across the specified axis, so vertex ordering is never changed and morph targets continue to work.

To do this, it needs a reference mesh: this reference needs to symmetrical across the desired axis in both vert count and vertex position. It does not need to be a perfectly symmetrial mesh but pretty close to it, especially in areas with high vertex Density to avoid the wrong vertex pair being found - matching is by closest vertex and not absolute position so there is some tolerance for asymmetry.

The top pick button is what you use to pick your undeformed symmetrical mesh. The mesh you pick must have the same vertex count as the mesh you have applied this to - currently it does not filter for count, likely for version 1.01.

Cache Target will not reload the undeformed mesh at each operation. Typically this will be left on. Update will update the cached undeformed mesh. Note that the cache survives saving and loading your scene.

Operation - mirror will mirror the positions of vertices from one side of your mesh to the other.

Operation - Flip will Swap the vertex positions from one side to the other - mirror axis Negative/positive make no sense for this mode and are disabled.

Operation - Reset will MOVE the verts to the undeformed meshes positions. Most useful when in SubObject mode when only certain vertices, say those accidentally moved and so interfering with morph targets, are to be reset.

The Mirror Axis controls enable xyz and negative/positive mirror directions.

Axis Offset allows you to modify where the mirror plane exists in relation to the object; usually it is best to have your pivot (and object offset) zeroed to the center of the object, bbut this allows you some flexibility in this area. you can free download Transmographier Modifier 1.1 now.