Fading Alpha Channel Over Time

Questions & Answers
1

Ive been researching around and am not finding a clear script to work with. I want to fade the opacity of a material over time. Can anyone giving me an example of how this would work?

3 
var _time:float = 3f;    //this is the time you need

void Update()
{
 var temp=renderer.material.color;

 temp.a+=Time.deltaTime/_time;
 renderer.material.color=temp;
}

if the material.color doesnt return the color or throws exception try with material.GetColor() of the property shown in the editor (some shaders have name like TintColor for color!)

4

There is plenty of ways, here is one :

// Init, when the fading start, called once
// Division is the devil, so I prepare the inverse of the duration
float durationInv = 1f / (duration != 0f ? duration : 1f );
// timer that will go from 0 to duration over time
timer = 0f;

and

// Somewhere in Update, called once per frame
float alpha = Mathf.Lerp( 1f, 0f, timer * durationInv );
timer += Time.deltaTime;
// I'll guess the script is attached to the object you want to fade out, and that you have the appropriate shader.
renderer.material.color = new Color( r, g, b, alpha );

But you could use iTween as well.

2

If it’s not occuring under any strict circumstances you can always use an animation for it. The material has to be transparent for that to happen in the game though.

5

You can use LeanTween to fade an object, here is an example:

var time:float = 2.0;
var alphaVal:float = 0.0;
LeanTween.alpha(gameObject, alphaVal, time);

Just make sure that the object has a shader that supports transparency! I would recommend Owl Labs Shaders: http://owlchemylabs.com/content/ (Unlit with Alpha);