You can achieve this by adding colliders to your object and camera.

• preferably set the camera collider isTrigger on if the object is a rigid body.
• You can use tags, layers and game object name to filter which object you want to operate on.

Here is the code:

[RequireComponent(typeof(Collider))] public class FrustomColliderDetector { //Gets called when it enters the camera collider private void OnCollisionEnter(Collision other) { if(other.gameObject.tag == "object-tag") other.gameObject.SetActive(true); } //Gets called when it leaves the camera collider private void OnCollisionExit(Collision other) { if(other.gameObject.tag == "object-tag") other.gameObject.SetActive(false); } } 

You can achieve this by adding colliders to your object and camera.

• preferably set the camera collider isTrigger on if the object is a rigid body.
• You can use tags, layers and game object name to filter which object you want to operate on.

Here is the code:

[RequireComponent(typeof(Collider))] public class FrustomColliderDetector : MonoBehaviour { //Gets called when it enters the camera collider private void OnCollisionEnter(Collision other) { if(other.gameObject.tag == "object-tag") other.gameObject.SetActive(true); } //Gets called when it leaves the camera collider private void OnCollisionExit(Collision other) { if(other.gameObject.tag == "object-tag") other.gameObject.SetActive(false); } }