Hello,
I’m wondering if it is possible to use vertex groups from Blender instead of polygroups from ZBrush. It’s basically the same but I can’t seem to be able to use vertex groups in WrapX, or am I missing something?
thank you 
Hello!
As far as I know OBJ file format doesn’t support Blender vertex groups (and so WrapX doesn’t). It is more advanced concept than polygon groups which cannot be mapped onto polygroups in general. However in some cases it is possible. Check this - maybe it is your case http://blenderartists.org/forum/showthread.php?153927-Export-Vertex-Groups-as-OBJ-groups
Hello, thank you for your fast answer 
Actually it was my mistake. There is a box to check in the OBJ export options from Blender and the vertex groups are working perfectly in WrapX after that
I just used your code from another topic.
eyeSockets = basemesh.selectPolygonsByPolygroup(“thenameofyoureyepolygroup”)
mouthSocket = basemesh.selectPolygonsByPolygroup(“thenameofyourmouthpolygroup”)
freePolygonsBasemesh = wrap.selectPolygons(basemesh, eyeSockets + mouthSocket)
Have a nice day!
That’s great!