fader for Unity

FadePanel.cs

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class FadePanel : MonoBehaviour {

	public float fadeInTime= 1f;

	private Image fadePanel;
	private Color currentColor = new Color(0f,0f,0f,1f); // or = Color.black;
	
	void Start() {
		fadePanel = GetComponent<Image>(); if (!fadePanel) Debug.LogError (this + " fadePanel IMAGE failure");
	}
	
	void Update () {
		if (Time.timeSinceLevelLoad < fadeInTime) {
			float alphaChange = Time.deltaTime / fadeInTime;
			currentColor.a -= alphaChange;
			Debug.Log (this + " Delta: " + alphaChange + " for Alpha result: " + currentColor.a);
			fadePanel.color = currentColor;
		} else {
			gameObject.SetActive(false);
		}
	}
}

FadePanel (FadePanel) Delta: 0.006666666 for Alpha result: 0.9933333​
...
FadePanel (FadePanel) Delta: 0.005522184 for Alpha result: 0.4902869​
...
FadePanel (FadePanel) Delta: 0.005522385 for Alpha result: -0.001190957​