Hmm, adding multilight is a great and useful thing, but wouldn't it be more useful if lights inside groups were evaluated by those selections too - I mean who uses light objects\sources separately\ungrouped from their respected light fixture models ? (well, maybe, someone does but it's a rather unwieldy practice for sure) So my point would be - all light sources (be it the light object itself or corona light material for the light bulb\glass and the combo of both) inside the group (light fixture model) added to a multilight\render element should be treated as such - I really hope it's possible and it wasn't omitted just because of some yet another 3ds max's limitation, still, something tells me materials aren't as easily managed by those dialogs as one could wish.
Plus there's possibly another thing - could a multilight selection of one light or light containing group automatically evaluate all of it's instances too ? That might be quite useful for dealing with some complex scenes but is not as necessary as light inside a group evaluation, which I think, is a must because multilight without it can be quite a time chewer especially when say some complex chandelier model with non specifically named lamp objects buried inside some 5 or more group levels or some building model with lighted rooms are involved - imagine digging through all those groups just to get to the lights which are named like Corona light 100500 and so on... Yeah I agree in advance - good quality or self made models usually don't suffer from unnamed lights and from as deep group levels as I described but I'm talking some real life situation's here - 3ddd, yep, I'm pointing your direction )
I hope I didn't miss something out and didn't make a fool of myself again, still, that wouldn't be the first time so I guess I'll deal with it, somehow )