I have an object which has undergone several processes, firstly created in FZ as a couple of revolved profiles, but with other parts unioned on or differenced away etc.
It is somewhat imperfect having been through a number of operations and although I normally regularly use object doctor, unmesh, reduce-mesh on objects if required, if I do much more to this object it wants to turn into a surface object as it apparently contains holes. Is there a best practice to rescue an object like this so it won't inadvertently turn to surface? I tried 3d mesh on a copy of it, but which exacerbated problems. I'm keeping a copy as a backup but wondered if there is an easy repair. Did I used to get a warning message if an object was about to turn to surface? If I did and switched it off how do I switch it on again?