I’d really like to get any input and help on exactly why it’s not working under some circumstances if anyone knows or has any ideas at all as to why. If you don’t add any edge loops, or do not create a mesh from Zspheres, it works fine. It doesn’t work when you create any geometry in Zbrush, such as adding edge loops to your mesh. What I’ve found is that sometimes it works, sometimes it doesn’t. I’ve been testing out importing/exporting obj files back and forth between Blender & Zbrush.