This is used to render parts of the scene selectively.

If the GameObject's layerMask AND the camera's cullingMask is zero then the game object will be invisible from this camera. See Layers for more information. See Also: camera component.

	// Only render objects in the first layer (Default layer)
	camera.cullingMask = 1 << 0;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        camera.cullingMask = 1 << 0;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		camera.cullingMask = (1 << 0)