i found a plugin do so(you can go youtube and search “Qremesher”),but can Zbrush 4r4 do this ??:o
here is what the plugin do:
http://www.youtube.com/watch?v=TiTR39dP8lo
i think that the qremesher guide line usually be the same as a seam…so if we can keep guide line as uv seam,Qremesher will be more great…