detect Ray cast without having Collider on Game Object

Question

so I'm trying to detect an object without having collider on that object but unfortunately I'm stuck on it ;

Answer 1

With the exception of a graphics raycast for UI elements on a canvas and possibly Plane.Raycast which is specific to planes, Unity Raycasts hit colliders and nothing else. If you want an object to be hit by raycasts you need to add a collider.