Ring on a necklace model I have a cloth string covered with a skin to replicate a necklace.
Now I want to add a pendant. I am using a torus only to try and simulate the interactions first.
I have added a rigid body to both the skin object and torus, and added a rigid constraint to both and associated each object to each other, but they pass through.
Any advice?
Please see attached blend file
I have changed the parameters to try and make this more simple - made 2 soft body interactions, but cant make them seem or act in a solid fashion - any tips or advice? See second blend file.
Okay update - used cloth and collision for both objects and they interact better - but the torus is still soft, rather than hard - how to I make an object retain its shape when it interacts with a cloth object? See 3rd blend file
4th Update
Got a torus to interact with a serious of rigid body chains, however they are not movable - See 4th blend file
I found this link helpful.

I got rid of the Rigid Body Constraints.  They were doing nothing.
I set Torus.013 (center link) RB to active, mass of 0.5kg, margin 0.5m
Torus.026 (pendant) margin to 1m.

I believe that is all.   Here is the modified file, far from perfect: