Hide Specific Layers from Camera?

From what I know, cullingMask looks like this:

Code (CSharp):

1. camera.cullingMask = 1 | 2 | 3

What I do not know, is how to add specific numbers to this integer.

I tried turning it into a int[] but this doesn't work.

I want to dynamically hide layers, and show certain layers.

 

layermasks use the bitwise operator <<, "left bit shift"

http://en.wikipedia.org/wiki/Bitwise_operation
http://docs.unity3d.com/ScriptReference/Camera-cullingMask.html

 

So how can I add/exclude certain integers?

 

have a look at this thread:

http://answers.unity3d.com/questions/416919/making-raycast-ignore-multiple-layers.html

 

Well I tried this, but doesn't seem to work!

Code (CSharp):

1. LayerMask MASK = new LayerMask ();
2.         for (int i=0; i<10; i++) {
3.             if (i>FloorAt)
4.             {
5.                 MASK |= Physics.kIgnoreRaycastLayer;
6.                 MASK = ~LayerMask.NameToLayer("layer"+i);
7.             }
8.                 }
9.         camera.cullingMask = MASK;
10.     }