@andr3w The destruction is done offline, ahead of time in Blender - using cell fracture to create the broken fragments' meshes. Then in Godot, I set up each broken piece as a separate rigidbody with a simple convex hull collider, and replace the undamaged mesh with the broken pieces when the building is damaged. This is a manually tedious and time consuming approach, but performs well during runtime since there are no fracturing calculations performed during runtime.