Colliders do not collide

Unity Engine
1

Hi,
I imported a mesh which has a hierarchy with a generated collider. The mesh collider is a component of a child object. It is instantiated on runtime and supposed to collide with other instances. But collision does not work.

Any ideas whats happening?

Thanks

2

Are you using a rigidbody component to move the object? If you set transform.position directly (or use transform.Translate) then the physics engine won’t be able to register the collision.

3

I use rigidbody but it did not work. Finally I added primitive colliders from Unity and then it worked. Still I have no reason why it doesn’t work.