You, me and probably all other Maya users.
Just rediscovered this great and very useful tool for easy transferring between several 3D editors, including Blender, MoI 3D and Zbrush. 
ZBrush tip: activate ZBrush Preferences ➔ Import Export ➔ Import Mat As Groups to transfer Obj materials to Polygroups, so you can ZRemesh them / assign polypaint and/or materials to the groups.
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