Unity3D Editor Script : Displays gameobjects linked to each shader present in a scene.

ShadersLister.cs

//Copyright © 2015 Manoj M J
//All Rights Reserved

//Why I do copyright the code that I provide at gist.github.com 
//( https://gist.github.com/mmj-the-fighter/bccd0a7ff57c638beee8 )

/*
 * ShadersLister.cs - Displays gameobjects linked to each shader present in a scene. 
 * It is useful for checking if the scene contains any unwanted shaders.
 */
using UnityEngine;
using UnityEditor;
using System.Collections;

public class ShadersLister : EditorWindow {
	private Hashtable shaderGameObjectTable = new Hashtable();
	private Vector2 scrollPosition;
	
	[ MenuItem( "Tools/ShadersLister" ) ]
	public static void Launch()
	{
		EditorWindow window = GetWindow( typeof( ShadersLister ) );
		window.Show();
	}

	public void UpdateList()
	{
		Object[] renderers;

		shaderGameObjectTable.Clear();		
		renderers = FindObjectsOfType( typeof( Renderer ) );


		foreach( Renderer renderer in renderers )
		{
			foreach(Material mat in renderer.sharedMaterials)
			{
				string shaderName = mat.shader.name;
				if( !shaderGameObjectTable.ContainsKey (shaderName) )
				{
					shaderGameObjectTable[shaderName] = new ArrayList();
				}
				( ( ArrayList )shaderGameObjectTable[shaderName] ).Add( renderer.gameObject);
			}

		}
	}
	
	
	
	public void OnGUI()
	{
		
		GUILayout.BeginHorizontal();
		GUILayout.Label( "Shaders in scene:" );
		GUILayout.FlexibleSpace();
		if( GUILayout.Button( "Refresh" ) )
		{
			UpdateList();
		}
		GUILayout.EndHorizontal();
		GUILayout.BeginHorizontal();

		
		scrollPosition = GUILayout.BeginScrollView(scrollPosition);

		foreach (string shaderName in shaderGameObjectTable.Keys)
		{
			GUILayout.Label( shaderName + ":" );
			foreach(GameObject gameObject in (ArrayList)shaderGameObjectTable[shaderName])
			{
				if (GUILayout.Button(gameObject.name))
				{
					Selection.activeObject = gameObject;
				}
			}
		}
		GUILayout.EndScrollView();
	}
}