Anyone with a solution to this problem ?
What value is in the Tool>Geometry>Size>XYZ Size slider? ZBrush needs meshes to be within a certain size limit in order to work well. When importing an OBJ ZBrush will auto-scale but GoZ doesn’t do this, so sometimes meshes can be too large.
You should be able to note down the value of the Tool>Geometry>Size>XYZ Size slider, reduce the size (for example to 1) and then scale back up to the orioginal value before GoZing back to Max.