fading from one scene to another not working

Question

I am using the following code to fade from one scene to another, but it doesn't fade. It just loads the next scene without fading. I suspect there's something wrong with the image I'm using. I used a black .png image with dimensions 425×344 that I downloaded from Google. How can I solve this issue?

Fading.cs (I added this to an empty game object)

public Texture2D fadeOutTexture;
public float fadeSpeed = 0.8f; 

private int drawDepth = -1000; 
private float alpha = 1.0f; 
private int fadeDir = -1; 


void onGUI () {

    alpha += fadeDir * fadeSpeed * Time.deltaTime;
    alpha = Mathf.Clamp01(alpha);
    GUI.color = new Color (GUI.color.g, GUI.color.b, alpha);
    GUI.depth = drawDepth; 
    GUI.DrawTexture (new Rect (0, 0, Screen.width, Screen.height), fadeOutTexture); }

public float BeginFade (int direction) {
    fadeDir = direction;
    return (fadeSpeed); }

void onLevelWasLoaded() {
    BeginFade (-1);

}

In the script of the trigger object:

IEnumerator gameScene2() {
    float fadeTime = GameObject.Find ("FadeObject").GetComponent<Fading>().BeginFade(1);
    yield return new WaitForSeconds(fadeTime);
    Application.LoadLevel("Scene2");
}

These are the image settings for the black .png image

Answer 1

Some things I noticed:

• onGUI and onLevelWasLoaded should be OnGUI/OnLevelWasLoaded

• You forgot to set the red component here, so you are not setting the alpha value of the color

  GUI.color = new Color (GUI.color.g, GUI.color.b, alpha);

• Try to set the alphaBlend parameter to true on the DrawTexture function (I think it's true by default, but I didn't test it, so give it a try):

  GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), fadeOutTexture, ScaleMode.StretchToFill, true);

• You shouldn't change the alpha value in the OnGUI function, it's better to do in the Update

• I don't know how you are using the code, but remember that Unity will destroy the object you attached the script on when you load a new scene. I suggest you to write a static class to switch levels, or use DontDestroyOnLoad on your GameObject