Well, I'm using 2017 (which is quite good especially in terms of viewport speed btw. - see some up to 4x speed improvement on some scenes !!!) and Corona converter works as it should well at least no different from what it does in previous versions of 3ds max.
One thing though, somehow, for quite a time, I didn't notice what show maps ON\OFF buttons were removed in the 1.27 version - could you bring those back please, those helped tremendously on some large scenes where even my gpu's 8gig ram is not enough (not to tell how some of my colleague's 2 or 4 gig gpu's behave in such a scenes)), I mean the kind of scenes with literally thousands of materials with even more textures, where going and enabling\disabling of all of those manually is a tremendous job of itself aka a total waste of time and effort and where show map off done on all the scene and then enabling those only on some currently worked on parts can help to maintain a somewhat decent performance due to a controllable gpu ram usage.
Of course I understand what those kind of scenes are rather rare and what most of users just don't need those functions + your desire to keep converter's ui as uncluttered as possible is understandable as well, but if so, maybe you could do some separate macro script from that part of CC's code which was responsible for those ? - I am probably too greedy (as usual)) but, what would be of no less help too and maybe it could even be some separate macro's for show'\hide on selected, show\hide all, which could be pinned to whatever part of max's ui or even to a quad menu if one wishes )
