hits = Physics.SphereCastAll (transform.position,3f,transform.up,0,-1);

		for (int i = 0; i < hits.Length;i++) {

			RaycastHit currHit = hits[i];
			if (currHit.transform.GetComponent<NodeMaterial> () != null) {

				currHit.transform.GetComponent<NodeMaterial> ().Cover();

				if (Physics.Raycast (currHit.transform.position,transform.position,Vector3.Distance(currHit.transform.position,transform.position), layMask))
{
Debug.DrawLine (transform.position,currHit.transform.position, Color.red,30f);
currHit.transform.GetComponent<NodeMaterial> ().UnCover();
}

}
}