Accesing WebCam on PC Standalone Build

How can i accessing Webcam on a main camera? Cause i’ve try to accessing webcam on a 3d object (Quad), but it cause a reflection light on it. How can i solve this ? Thanks for helping

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

public class CameraScript : MonoBehaviour
{

    static WebCamTexture backCam;

    void Start()
    {
        if (backCam == null)
            backCam = new WebCamTexture();

        GetComponent<Renderer>().material.mainTexture = backCam;

        if (!backCam.isPlaying)
            backCam.Play();

    }

    void Update()
    {

    }
}

Iam using this code for a Quad Component as script

Try unlit material to avoid lights on an object.

Where it is ? Could you please screenshot that feature ?

just change your shader into unlit