Fade Camera

Here are some links that might actually help someone:

1. Answer using OnGui

2. Wiki article

3. Another answer using OnGui

The method is quite similar on all of them, you want to draw a texture in front of the camera that gradually goes from being transparent to black.

Posted as a separate answer for visibility

One way:

Create > UI > Image. Stretch to canvas.

 void FadeToBlack ()
 {
 blackScreen.color = Color.black;
 blackScreen.canvasRenderer.SetAlpha (0.0f)
 blackScreen.CrossFadeAlpha (1.0f, time, false);
 }
     
 void FadeFromBlack ()
 {
 blackScreen.color = Color.black;
 blackScreen.canvasRenderer.SetAlpha (1.0f)
 blackScreen.CrossFadeAlpha (0.0f, time, false);
 }

push the space bar....

     Texture2D blk;
     public bool fade;
     public float alph;
     void Start(){
         //make a tiny black texture
         blk = new Texture2D (1, 1);
         blk.SetPixel (0, 0, new Color(0,0,0,0));
         blk.Apply ();
     }
     // put it on your screen
     void OnGUI(){
         GUI.DrawTexture (new Rect(0, 0, Screen.width, Screen.height),blk);
     }
     
     void Update () {
         if(Input.GetKeyDown("space")){fade=!fade;}
         
         
         if (!fade) {
             if (alph > 0) {
                 alph -= Time.deltaTime * .2f;
                 if (alph < 0) {alph = 0f;}
                 blk.SetPixel (0, 0, new Color (0, 0, 0, alph));
                 blk.Apply ();
             }
         } 
         if (fade) {
             if (alph < 1) {
                 alph += Time.deltaTime * .2f;
                 if (alph > 1) {alph = 1f;}
                 blk.SetPixel (0, 0, new Color (0, 0, 0, alph));
                 blk.Apply ();
             }
         }
     }

http://answers.unity3d.com/questions/8540/how-to-fade-inout-a-scene.html

Please Google next time.

 https://www.google.com/search?rlz=1C1GGGE_enUS456US456&gcx=c&sourceid=chrome&ie=UTF-8&q=camera+fade+unity3d