Can't Update CullingGroup BoundingDistances

I'm trying to set my bounding distances in Update. I'm making a 2.5d game and the zoom uses the orthographic size. I'd like to resize the bounding area proportional to my camera but it doesn't seem to want to update.

Code (CSharp):

1.  private void Update() {
2.         RaycastHit HitInfo;
3.         if (Physics.Raycast(Camera.main.transform.position, Camera.main.transform.forward, out HitInfo, 1000f)) {
4.             group.SetDistanceReferencePoint(HitInfo.point);
5.         }
6.         //group.SetBoundingDistances(new float[] { Camera.main.orthographicSize * 2.5f });
7.         group.SetBoundingDistances(new float[] { Camera.main.orthographicSize});
8.     }

If I set a variable and change that manually it works as intended.
This works.

Code (CSharp):

1. public int size;
2.  
3.     private void Update() {
4.         RaycastHit HitInfo;
5.         if (Physics.Raycast(Camera.main.transform.position, Camera.main.transform.forward, out HitInfo, 1000f)) {
6.             group.SetDistanceReferencePoint(HitInfo.point);
7.         }
8.         //size = (int)Camera.main.orthographicSize;
9.         //group.SetBoundingDistances(new float[] { Camera.main.orthographicSize});
10.         group.SetBoundingDistances(new float[] { size });
11.         Debug.Log(Camera.main.orthographicSize);
12.     }

If I set that SAME VARIABLE to the orthographic size it DOES NOT work.

Code (CSharp):

1.  public int size;
2.  
3.     private void Update() {
4.         RaycastHit HitInfo;
5.         if (Physics.Raycast(Camera.main.transform.position, Camera.main.transform.forward, out HitInfo, 1000f)) {
6.             group.SetDistanceReferencePoint(HitInfo.point);
7.         }
8.         size = (int)Camera.main.orthographicSize;
9.         //group.SetBoundingDistances(new float[] { Camera.main.orthographicSize});
10.         group.SetBoundingDistances(new float[] { size });
11.         Debug.Log(Camera.main.orthographicSize);
12.     }