当鼠标悬停在统一的游戏对象上时，鼠标悬停不会改变材质

Question

I want to be able to hover over certain game objects and the object changes material. I cannot figure out why my game object won't change material when I hover over it. I have made sure and added the materials in the inspector. I have tried multiple ways to get it to work but still no luck. I am using unity 2018.4.16. I have tried using different examples and looked at the documentation, but alas I am stuck in the water. Any help would be very appreciated.

        public Material startColor;
        public Material mouseOverColor;
        Renderer rend;

        void OnMouseOver()
        {
            rend.sharedMaterial = mouseOverColor;
        }

        void OnMouseExit()
        {
            rend.sharedMaterial = startColor;
        }

        // Start is called before the first frame update
        void Start()
        {
            rend = GetComponent<Renderer>();
            rend.enabled = true;
            rend.sharedMaterial = startColor;
        }

Answer 1

I ended up finding a solution. I needed to add a "Rigidbody" component and then checking "Is Kinematic" in the inspector as well as adding a "mesh collider" component, and now it works for anyone who is having a similar issue.