public class PixelGetter : MonoBehaviour {

    Ray _ray;
    RaycastHit _hit;
    Renderer _renderer;
    public CRT_LEVEL1 crt;
    // Use this forendererr initialization
    void Start () {
        _ray = new Ray(transform.position, Vector3.down);
        _renderer = GetComponent<Renderer>();
    }

    // Update is called once per frame
    void Update () {
        _ray.origin = transform.position;
        if (Physics.Raycast(_ray, Mathf.Infinity, LayerMask.GetMask("Shaded")))
        {
            //remplace ça par ta fonction a toi
            _renderer.material.color = crt.texture.GetPixel((int)_hit.textureCoord.x, (int)_hit.textureCoord.y);
        }
    }
}