Well sure a really old feature that rip off , was always working ! It even looked a little better a long time ago, I always use this feature especially when making promo renders and documentations for assets. And naturally it includes allot of preview renders to show the wireframes . But ok if it is so unnecessary just let them remove this feature as well Firefly guess it is the easy way to fix an issue.  

That old P4 render engine still makes pretty neat renders ! for certain things still very useful for sure .....

but anyway I have no Idea what these programmers of poser are doing or if they really know what they are doing !? Poser 13 is still full of old hyperlinks to RDNA, contentparadise, the old activation servers and the producturlsupport.com in the launch startup ! so no wonder that allot of issues occur in Poser if it tries to access all these servers that are supposed to be  dead.