Is it always necessary to have a collider AND rigidbody on an object if you simply want to know if two objects collide? I have two objects with colliders. I control the position of the objects at all time. It seems unnecessary to add rigidbodies.
I mean, what are colliders for if you always need rigidbodies to use them for collisions? I know that colliders are also used for raycasting, but is that it? Do you always need rigidbodies if you actually want to use them for collision detection?