How to fade in and out of a scene?

Questions & Answers
1

I want the scene to fade in from black to the actual scene. I have this code down here:

using UnityEngine;
using System.Collections;


public class FadeScript : MonoBehaviour
{
	public static Texture2D Fade;
	public bool fadingOut = false;
	public float alphaFadeValue = 1;
	public float fadeSpeed = 2;
	public Texture2D blackscreen;
	
	// Use this for initialization
	void Start ()
	{
	}
	
	// Update is called once per frame
	void OnGUI ()
	{
		alphaFadeValue -= Mathf.Clamp01(Time.deltaTime / 5);
		
		GUI.color = new Color(0, 0, 0, alphaFadeValue);
		GUI.DrawTexture( new Rect(0, 0, Screen.width, Screen.height ), blackscreen);
	}
	
}

blackscreen is a completely black image by the way.

Anyway, the code doesn’t work the screen starts out white (not black) and after a second it immediately turns to the scene. What’s wrong here? Thank you!

2

I think the issue is with the way you’re keeping track of time. This works fine, for example:

public class Fade : MonoBehaviour {
	Texture2D tex;

	public Color texColor = Color.black;

	public Color startColor = new Color(0f, 0f, 0f, 0f);
	public Color endColor = new Color(0f, 0f, 0f, 1f);

	public float duration = 2f;

	bool show;

	float timer;

	void Start() {
		//generate texture from scratch (optional)
		const int size = 512;
		tex = new Texture2D (size, size);
		for (int i=0; i<size; i++) {
			for (int j=0; j<size; j++) {
				tex.SetPixel(i, j, texColor);
			}
		}
		tex.Apply();

		//call function in 3 seconds    
		Invoke("StartFade", 3f);
	}

	void StartFade() {
		timer = 0f;
		show = true;
	}

	void Update() {
		timer += Time.deltaTime;
	}

	void OnGUI() {
		if (show) {
			float percent = Mathf.Clamp01 (timer / duration);
			GUI.color = Color.Lerp (startColor, endColor, percent);
			GUI.DrawTexture (new Rect (0, 0, Screen.width, Screen.height), tex);
		}
3

So it turned out that my orignal code did work. The white screen was just my level loading and unfortunately it was covering up my fade animation.