linerobot/Unity/LineRobot/Assets/Depth2.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(Camera))]
public class Depth2 : MonoBehaviour
{
    //material that's applied when doing postprocessing
    [SerializeField]
    private Material postprocessMaterial;

    private void Start()
    {
        Camera camera = GetComponent<Camera>();
        camera.depthTextureMode = camera.depthTextureMode | DepthTextureMode.Depth;
    }

    //method which is automatically called by unity after the camera is done rendering
    void OnRenderImage(RenderTexture source, RenderTexture destination)
    {
        //draws the pixels from the source texture to the destination texture
        Graphics.Blit(source, destination, postprocessMaterial);
    }
}