public class PLaneScript : MonoBehaviour {
  public Color TranspColor = new Color(0,0,0,0);
  public float transparency;
  public Texture2D TranspTexture;
  // Use this for initialization
  void Start () {
    TranspTexture = new Texture2D(1,1);
    TranspTexture.SetPixel(0,0,new Color(0,0,0,transparency));
    TranspTexture.Apply();
    renderer.material.mainTexture = TranspTexture;
     
  }
   
  // Update is called once per frame
  void Update () {
    TranspTexture.SetPixel(0,0,new Color(0,0,0,transparency));
    TranspTexture.Apply();
     
  }
}