Underwater effect question

Questions & Answers
1

I have two question actually. First is, how to I make an image effect ( motion blur ) start when I go under water and end 3 seconds after I get out and the second question, how do I add some particle effects like air bubbles only when the player is underwater? Here is my code so far:

var underwaterLevel = 9;

private var defaultFog = RenderSettings.fog;

private var defaultFogColor = RenderSettings.fogColor;

private var defaultFogDensity = RenderSettings.fogDensity;

private var defaultSkybox = RenderSettings.skybox;

var noSkybox : Material;

function Start ()

{ camera.backgroundColor = Color (0, 0.8, 0.8, 1); }

function Update ()

{ 

if (transform.position.y < underwaterLevel) 
{    
    RenderSettings.fog = true;  
    RenderSettings.fogColor = Color (0, 0.6, 0.8, 0.9);
    RenderSettings.fogDensity = 0.1;     
    RenderSettings.skybox = noSkybox; 
}    

else 
{     
    RenderSettings.fog = defaultFog;    
    RenderSettings.fogColor = defaultFogColor;      
    RenderSettings.fogDensity = defaultFogDensity;    
    RenderSettings.skybox = defaultSkybox;  
}

}

2

I seem to recall Unity's tropical island demo had a decent underwater effect. Download the project and try it. You could then take the bits you like and use it in your game.

3

For image effects, you can turn them on and off by flagging 'enabled' like any other component. Therefore,

GetComponent("MotionBlur").enabled = false;

You'll do the same thing when you exit the water, except start a timer in your else condition. So...

private var timer:float = 0;
if(transform.position.y < underwaterLevel)
  {
     timer = 3;
    // turn on everything//
   }

else
  {
     timer -= Time.deltaTime;
     if(timer <= 0)
     {
        //turn off everything//
     }
  }