=
button is clicked. If all goes well, the main target network turns
all yellow and rebuilds; all texture map properties have been copied
across from the source network, and the patch order and orientations
are exactly the same. That network should then be saved out to a new
SLICE file.
However, there might be situations where the networks don't have the
same topology. Maybe the complete first head network was edited after
the mirroring, and only the original half was used in the templating
to the second head.