Hello folks .
I dont know if it is the right place to post this kind of topics or no . Please guide me if im mistaken .
I'm having noob questions so please bear with me .

I am following the pluralsight tutorial introduction to houdini 15 but I'm working on the houdini 16 so the group node has been changed to multiple nodes . i did some research and I could understand it well but the issue is :

I have an geometry node of the car that includes separate pieces , Light , Wheels , … When I add a rigidbody operator it works fine but the car is treated as separate objects (every object falls apart) instead of being treated as a single object as a car .

Thank you very much . Please help me fix this problem .