I have a few bricks from the assets store that I am using in my scene. I want them to be able to be moved (like when you shoot them) and they end up falling through my terrain. I’m rather new to Unity and I’m not sure what I am doing wrong. By the way, I have the default character controller on my scene, and it does not fall through.
Build: 3.1f3
Anyone know?
To let them the ability to move you need to put them a prefab.
In the prefab you need to put 2 things:
rigidbody and script that destroy them when they falling off (when the y position is less then y possion of the terrain).
I hope that i help… 
Destroy them?
All I want is for the bricks to fall onto the terrain.
You’ll need to add a Mesh Collider and Rigidbody Component to it, like Elad said.
Hello,
(Non convex) Mesh Colliders don’t collide with other (non convex) Mesh Colliders or Terrains. Use a primitive collider(box, sphere, capsule).
Best wishes,
-Lincoln Green