I did that, but now I can't see the 3 pieces I made subitems of the other piece when I run the map. So let's say I have:
leverControlledBox1, and also 2, 3, and 4.
When I drag 2, 3 and 4 under leverControlledBox1, I do in fact get the 3 subitems.
And when I click any part of it in the Perspective frame, I see it is now 1 item as I hoped for.
Unfortunately, when you run the program, only leverControlledBox1 is visible.
What did I do?
EDIT:
So I figured out that only the main item in the list can have mass. Once I made the mass of all subitems = 0, then the items once again appeared in the game when I tested it.
However, only the main item reacts to the SlidingDoor.lua. So I've run into a contradiction:
If I can't make the elevator move by moving just the main item, which should theoretically move all the subitems, then I'm forced to add the SlidingDoor.lua to each subitem as well, but that script requires mass, which makes the subitems invisible.
This seems to be a contradiction. What is the solution?