Destruction: Particles should fall only, when no more connection to lower particles

[Alexx31]

I have a breadth-first bind search in the Property Test that allows you to test for regular bind connectivity like that, but not PhysX bind connectivity...I should make a note about that and add it in the future.

Hello Tyson, I just wanted to ask back about this kind of Property Test, to prevent mesh parts floating in the air.
(simple example: collapsing house due to impact in the house middle, but the roof keeps floating in the air, even after below everything is collapsed).


I have seen there the Test Type "Binds Broken (PhysX)", is that maybe the attribute? 
In case yes, how should it be set up for a floating mesh of many pieces.


I always think, it must be somehow tested, if there is any connection to the "ground" left. Like testing if the "chain" of neighbours still has any contact to the ground. 

(The situation, that pieces just float unwanted in the air, happens more often to me, so I came back on this topic. Maybe worth an simple example file for beginners )


Many thanks