Overdraw Debugger Unity

OverdrawDebugReplacement.cs

using UnityEngine;
using System.Collections;

public class OverdrawDebugReplacement : MonoBehaviour
{
    public Shader _OverdrawShader;
    
    private Camera _Camera;
    private bool _SceneFogSettings = false;

    void OnLevelWasLoaded()
    {
        // Every time a scene is loaded we have to disable fog. We save it for restorting it later in OnDisable
        _SceneFogSettings = RenderSettings.fog;
        RenderSettings.fog = false;
    }

    void OnEnable()
    {
        // not set in the editor inspector
        if (_OverdrawShader == null)
        {
            // It must be added on Project Settings -> Graphics -> Always Include Shader if you want to see it on the build.
            _OverdrawShader = Shader.Find("Custom/OverdrawDebugReplacement");
        }

        _Camera = GetComponent<Camera>();

        if (_OverdrawShader != null && _Camera != null)
        {
            RenderSettings.fog = false;
            Camera camera = GetComponent<Camera>();
            camera.SetReplacementShader(_OverdrawShader, "");
        }
        else
        {
            Debug.LogWarning("Can't use OverdrawDebugReplace. Check if script is attached to a camera object.");
        }
    }

    void OnDisable()
    {
        if (_Camera != null)
        {
            RenderSettings.fog = _SceneFogSettings;
            camera.SetReplacementShader(null, "");
        }
    }
}

OverdrawDebugReplacement.shader

Shader "Custom/OverdrawDebugReplacement" 
{
	SubShader 
	{
		Tags {"RenderType" = "Opaque"}
		LOD 100
		
		Pass
		{
			Blend One One
			
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			
			half4 vert(half4 vertex : POSITION) : SV_POSITION
			{
				return mul(UNITY_MATRIX_MVP, vertex);
			}
			
			fixed4 frag(half4 vertex : SV_POSITION) : COLOR
			{
				return fixed4(0.1, 0.1, 0.1, 1.0);
			}
			ENDCG
		}
	} 
}

Hi there,

if is Blend One One, RenderType should be Transparent, no?