THIS!, or can’t bring back prior ‘sculpt’ after a fair amount of work. For such a modern engine, this is insane. Maybe sculpting 'after save’can’t be undone, but if true I guess the undo system was put in place in the context of those using it, would USE SVN or such ? Till addressed and maybe that was the intent, I’ll just finally get around to plastic and hopefully avoid issues going forward, and backing up with some regularity.