TriggerObscuringItemFader.cs

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using UnityEngine;
 
public class TriggerObscuringItemFader : MonoBehaviour
{
    private void OnTriggerEnter2D( Collider2D collision )
    {
        ObscuringItemFader[] obscuringItemFader = collision.gameObject.GetComponentsInChildren<ObscuringItemFader>();
 
        if(  obscuringItemFader.Length > 0 )
        {
            for( int i = 0; i < obscuringItemFader.Length; i++ )
            {
                obscuringItemFader[i].FadeOut();
            }
        }
    }
 
    private void OnTriggerExit2D( Collider2D collision )
    {
        ObscuringItemFader[] obscuringItemFader = collision.gameObject.GetComponentsInChildren<ObscuringItemFader>();
 
        if( obscuringItemFader.Length > 0 )
        {
            for( int i = 0; i < obscuringItemFader.Length; i++ )
            {
                obscuringItemFader[i].FadeIn();
            }
        }
    }
}