>>935937
a mesh is just a single 3d object, they are called tools in Zbrush, depending on what you are working on it is good to keep the the things that way, you can retopo and make polygroups too but it is more advanced, after I have all sculpted I save that just in case I want to add variations and I merge and clean everything, I could need to do retopology if i want to add more detail, to paint it or to do animations or just decimate it if I'm doing models to print.