Hello, I’m a new user of Zbrush. As a result, I’m still very shaky on using transpose to repose a figure in zbrush, so I want to import some posed models from DAZ. The .obj file imports into the tools fine and renders well, but the moment I try to subdivide the polygons to get a smoother model, huge jagged breaks appear at each pivot point on the model. Nothing I can do seems to prevent this. Does anyone know why this occuring, or more importantly to increase the polygon count withi=out these breaks? Thanks alot.
It’s because the points aren’t welded. So when you subdivide the model, the smoothing effect literally pulls it apart at the seams.
I know DAZ has a setting to weld points on export. Alternative, there are options in ZBrush. Before importing, select the PolyMesh3D Tool (or any other 3D object). That gives you access to the Tool > Import menu where you can set the Weld slider. The higher the value, the more aggressively it will seek out points close to each other. Try a mid-range value. If you still get some splitting, import again with a higher setting. If some parts of the model crumple, try again with a lower setting.
Alternatively (and easier), in 4R4 you can import your model and then press Tool > Geometry > Modify Topology > WeldPoints. No slider settings to worry about. For most models with the issue you’re encountering, that is all you need. This is because a model that was contiguous before export will now have multiple individual points at exactly the same coordinates, so you don’t need ZBrush to search for points that are “in the neighborhood”. (Which is what the Weld slider tells ZBrush to do.)