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using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering;
public class ObjectOutline : MonoBehaviour
public Renderer OutlinedObject;
public Material WriteObject;
public Material ApplyOutline;
void Update()
if (Input.GetMouseButtonDown(0))
var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
bool hitSelectable = Physics.Raycast(ray, out var hit) && hit.transform.CompareTag("Selectable");
if (hitSelectable) {
OutlinedObject = hit.transform.GetComponent<Renderer>();
} else {
OutlinedObject = null;
void OnRenderImage(RenderTexture source, RenderTexture destination)
//setup stuff
var commands = new CommandBuffer();
int selectionBuffer = Shader.PropertyToID("_SelectionBuffer");
commands.GetTemporaryRT(selectionBuffer, source.descriptor);
//render selection buffer
commands.ClearRenderTarget(true, true, Color.clear);
if (OutlinedObject != null)
commands.DrawRenderer(OutlinedObject, WriteObject);
//apply everything and clean up in commandbuffer
commands.Blit(source, destination, ApplyOutline);
//execute and clean up commandbuffer itself