group option in zbrush when exporting as obj will sometimes result in split up geo. if you need to export as obj. turn of groups for export. But if you must need the groups, export as FBX instead.
My problem starts with a group of identical low poly meshes in a Zbrush project (3 identical cylinders, 1 subtool, 1 polygroup, no subdivisions). So: 1. I export them to Maya (export options: merge uv cords checked, export subgroups unchecked, smooth normals unchecked.) 2. I extract each of the three identical cylinders…