Camera.depth
var depth: float;
float depth;
depth as float
Description

Camera's depth in the camera rendering order.

Cameras with lower depth are rendered before cameras with higher depth.

Use this to control the order in which cameras are drawn if you have multiple cameras and some of them don't cover the full screen. See Also: camera component, Camera.rect property.
	// Set this camera to render after the main camera

camera.depth = Camera.main.depth + 1;
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        camera.depth = Camera.main.depth + 1;
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		camera.depth = (Camera.main.depth + 1)