When you set the override material in global switches to Include, it no longer works properly if you have just the group name selected, or some objects within a group selected. You have to have all of the objects in the group, and the group head in the list for it to work when set to Include. If I don’t want every object within that group to get the material override, I have to now separate it from that group, or redo it all using exclude (in a scene with 1,000’s of objects with an engineer’s part naming convention, this is not going to be fun). It used to work, as I’m working in a scene I did 2 1/2 years ago that was setup to include some objects within a group without the group object itself selected.
It does works properly for Exclude. I can select the group name, and it’ll render everything but the objects within that group with the material. Or I can select just one object in that group to exclude it. But it does freak out if I don’t have all of the objects selected within the group, AND the group head selected.
Edit: words are hard