I'm sure there is a simple answer to this but I've not been able to find one through Googling nor trial and error.
Let's say I have a group of primitives on a sphere and the group contains an islands of ungrouped primitives.
How can I also add these island primitives to the existing group without expanding the border primitives of the group?
This means simply expanding the group won't work as that would also change the border primitives.
Thanks in advance.
Peter