Not sure if I'm setting up my scene correctly, but working on some controlled fracturing with the breaking of bullet glue constraints, which is working great. However, when I add another wall and create a separate DopNetwork using Bullet, the two walls are not colliding with each other. I figured with both walls being RBD objects, they would collide.

Thanks

Why did you use two different AutoDopNetwork ?

It's not good idea to use different Solvers with same type in Houdini (e.g two Flip Solver , Pyro Solver , etc).

Also you should know that you can't simulate both AutoDopNetwork , You can turn On Both Network (Right Click on the Brain button and choose current simulation)