Changing two different objects renderer colour

Hey Dok101, Here is an old script I made for a project once, please add this to your assets in Unity and in a scene make a TextMesh.

take that textMesh and add it into this script through inspector panel. You may also need to create upto 3 extra materials to show you whats happening during runtime, but i dont think it will throw a wobbly if you dont.

Code....

 using UnityEngine;
 using System.Collections;
 /// <summary>
 /// GUI hover controls.
 /// Forces an audio source to the instance
 /// plays an audio object on mouse up 
 /// changes colour on mouse over and exit
 /// loads or plays based on textmesh being clicked on the screen
 /// 
 /// IMPORTANT!!!
 /// YOU MUST MAKE A TEXT MESH AND THEN APPLY THAT TO THE SLOT IN YOUR SCRIPT FOUND THROUGH INPECTOR.
 /// IT IS ALSO ADIVASBLE TO MAKE THREE MATERIALS(DIFFUSE FINE) AND CHANGE EACH COLOR.
 /// THE FADED OT MATERIAL JUST NEEDS TO BE SEE THOUGH OR HAVE NO TEXTURE OR SOMETHING, SEE UNITY MOBILE SHADERS->TRANSPARENT IN MATERIAL TYPE DROP DOWN
 /// </summary>
 [RequireComponent(typeof(AudioSource))]
 public class GUIHoverControls : MonoBehaviour 
 {
     public int levelToLoad; 
     public AudioClip narrative;
     public AudioClip beep;
     public bool isQuitButton = false;
     public float wait = 5.0f;
     public Material mat1;
     public Material mat2;
     public Material mat3;
     public Material fadedOutMat;
     
     
     public TextMesh txtMesh;
     // Use this for initialization
     private bool isClicked = false;
     /// <summary>
     /// Raises the mouse over event.
     /// </summary>
     void OnMouseOver()
     {
         /// change the material when hovering over
         ChangeColor(mat2);
             
         /// if leftmouse button cllicked
         if(Input.GetMouseButtonUp(0))
         {
             /// change mat to signify click occurence
             ChangeColor(mat3);
             /// if this is a wuit button 
             if(isQuitButton)
             {
              /// audio.clip = clickBeep;
                 audio.PlayOneShot(beep);
                 
                 /// exit game
                 Application.Quit();
             }
             else /// this is a button to load a level
             {
                 
                 Debug.Log ("loading level in 5 secs");
                 /// specifics hack to check if button is start game to allow button audio to yield before starting the level
                 if(txtMesh.text == "Another Button")
                 {
                     /// GUI.Label (new Rect(Screen.width/2,Screen.height /3,100,40), "Click to for Intro");
                     isClicked = true;
                     Debug.Log (isClicked);
                     StartCoroutine(StartIntroTalk());
                 }
                 else if(txtMesh.text == "Play gamE")
                 {
                     isClicked = true;
                     Debug.Log (isClicked);
                     StartCoroutine(LoadALevel());
                 }
                 else /// we checked and it wasnt the start button
                 {    
                     isClicked = false;
                     Debug.Log (isClicked);
                     /// StartCoroutine(LoadChosenLevel());
                 }
                 
             }
         }
     }
     
     /// <summary>
     /// Raises the mouse exit event.
     /// when the mouse exits the textmesh`s collision area
     /// </summary>
     void OnMouseExit()
     {
         /// return colour to normal white faded alpha
         ChangeColor (mat1);    
     }
     
     /// <summary>
     /// Changes the color.
     /// change colour method taking a material in as the argument
     /// </summary>
     /// <param name='mat'>
     /// Mat.
     /// </param>/ <summary>
     /// Changes the color.
     /// </summary>
     /// <param name='mat'>
     /// Mat.
     /// </param>/ <summary>
     /// Changes the color.
     /// </summary>
     /// <param name='mat'>
     /// Mat.
     /// </param>//
     void ChangeColor(Material mat)
     {
         /// if not mat1 or mat 2
         if(mat != fadedOutMat && mat != mat2 && mat != mat3)
         {
             /// mat must be mat 1
             mat = mat1;
         }
         else if(mat != fadedOutMat && mat != mat1 && mat!= mat3)
         {
             /// mat must be mat 2
             mat = mat2;
         }
         else if(mat != fadedOutMat && mat!= mat1 && mat!= mat2)
         {
             /// mat must be mat 3
             mat = mat3;
         }
         else
         {
             /// mat must be mat 4
             mat = fadedOutMat;
         }
         /// assign new material to the textMesh being operated on
         txtMesh.renderer.material = mat;
         
     }    
     /// <summary>
     /// Starts a narrative.
     /// 
     /// </summary>
     /// <returns>
     /// The intro talk after time
     /// </returns>
     IEnumerator StartIntroTalk()
     {
         audio.clip = narrative;
         audio.Play();
         if(isClicked)
         {
             ChangeColor (fadedOutMat);
         }
         yield 
             return
                 new WaitForSeconds(wait);    
     }
     /// <summary>
     /// Loads a level based on a mouse input to start game
     /// </summary>
     /// <returns>
     /// The A level.
     /// </returns>
     IEnumerator LoadALevel()
     {
         audio.PlayOneShot(beep);
         if(isClicked)
         {
             
             ChangeColor (fadedOutMat); /// txtMesh.renderer.material.color.a = new Color(txtMesh.renderer.material.color.r,txtMesh.renderer.color.g,txtMesh.renderer.color.b,0.0f);
         }
         yield 
             return
                 new WaitForSeconds(wait);
                  Application.LoadLevel(levelToLoad);
     }
     
 
 }/// end class
 

Anwyay. Not a complete answer, but a good place to start from. take care and let me know if you have any problems getting script to work (it`ll only be something simple to do with setup i stated above ) Take Care and thanks for reading Gruffy

edit:29.03.2014 Hey bud, here is a package, unzip it, then import it to your project. make a new scene and then drag the "GUIControlObject" prefab to your Main Camera object. The press play and mouse over or click them - also have your console window visible when playing.

Take care bud, and sorry again I did not get back very quick, I honestly didn`t realise you had commented further on your problem. Package here <---Please download this