How to stop raycast when there is a barrier blocking the object? - unity3d

Question

I'm using Raycast for picking up objects, whenever the player looking directly at a pickable object, the reticle colors turns to red meaning that it can be picked up. However, objects are still pickable even if there is a barrier between the raycast and the pickable object. like this image
as you can see the drawer is closed and the pickable object is inside, but the player still can pick it up!. it should pe pickable only when the object is exposed and the raycast hits it directly like this:
if (PickingUp)
{
if (heldObj == null) //if currently not holding anything
{
//perform raycast to check if player is looking at object within pickuprange
if (Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit, pickUpRange) && hit.transform.GetComponent<canPickUp_>() != null)
{
//make sure pickup tag is attached
// if (hit.transform.gameObject.tag == "canPickUp")
Debug.Log("Color should be changed");
if (hit.transform.CompareTag("TargetObj") && !targetObjectsList.Contains(hit.transform.gameObject))
{
/* if (aSource)
{
aSource.Play();
}*/
targetObjectsList.Add(hit.transform.gameObject);
}
PickUpObject(hit.transform.gameObject);
}
}
else
{
if (canDrop == true)
{
StopClipping(); //prevents object from clipping through walls
DropObject();
}
}
private void PickUpObject(GameObject pickUpObj)
{
if (pickUpObj.GetComponent<Rigidbody>()) //make sure the object has a RigidBody
{
heldObj = pickUpObj; //assign heldObj to the object that was hit by the raycast (no longer == null)
heldObjRb = pickUpObj.GetComponent<Rigidbody>(); //assign Rigidbody
heldObjRb.isKinematic = true;
heldObjRb.transform.parent = holdPos.transform; //parent object to holdposition
heldObj.layer = LayerNumber; //change the object layer to the holdLayer
//make sure object doesnt collide with player, it can cause weird bugs
Physics.IgnoreCollision(heldObj.GetComponent<Collider>(), player.GetComponent<Collider>(), true);
reticle.color = new Color(1, 1, 1, 0.75f);
reticle.enabled = false;
//transform.localScale = new Vector3(1 / heldObj.transform.localScale.x, 1 / heldObj.transform.localScale.y, 1 / heldObj.transform.localScale.z);
}
}
void DropObject()
{
//re-enable collision with player
Physics.IgnoreCollision(heldObj.GetComponent<Collider>(), player.GetComponent<Collider>(), false);
heldObj.layer = 0; //object assigned back to default layer
heldObjRb.isKinematic = false;
heldObj.transform.parent = null; //unparent object
heldObj = null; //undefine game object
reticle.color = new Color(1, 1, 1, 0.75f);
reticle.enabled = true;
}
How would I prevent this from happening?

Answer 1

As discussed in the comments the issue was that the "barrier" objects had their layers set to "Ignore Raycast", preventing the Physics.Raycast from reporting them as the hit.
Changing the layer to default (or any other layer that is not "Ignore Raycast") fixes the issue, as the "barrier" will be reported as the hit instead of the pickable object