Hey!

I'm working on a dynamics project for school and my objective is to simulate a castle tower taking a hit from a boulder (super original, I know!!) I modeled the tower in Maya with individual objects for each stone, and each of them has been modified to break the surface up to give it a rougher appearance. Doing this has created the problem of a lot of the geometry penetrating each other. When I run a simple sim in Houdini my wall pretty much explodes because of this.

Anyways, is there a way around this so that the tower stays intact until effected by the collision object?

I've attached an image to give an example of what the base of the tower looks like.

Thanks!

are you using Glue Network Constraint to hold pieces together, it should work?
if you still have problem, you can use proxy version of your geometry (which doesn't penetrate) for sim then apply the motion on hires