NotHitTransparent.CS

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class NotHitTransparent : MonoBehaviour
{
    [Range(0, 1)] public float threshold = 0.5f;

    // Start is called before the first frame update
    void Start()
    {
        Image image = GetComponent<Image>();
        if(image != null) {
            image.alphaHitTestMinimumThreshold = threshold;
        } else {
            Debug.Log("Image is null!!");
        }
    }
}