How can I Make a Cut scene in Unity and a loading screen as Well?

Questions & Answers
1

I need to know how to make intros cut scenes etc with the butterfly effect during the game and a loading Screen when the game starts.

2

For a code-less solution inside Unity, use a cutscene editor such as uSequencer or Aperture:

http://u3d.as/content/kurt-loeffler/aperture-cutscene-editor/2F2

Or you can write a cutscene component class, something like (C#, but Javascript is similar):

public class Cutscene : MonoBehaviour {

    public bool startImmediately = false;

    private bool running = false;

    void Start() {
        if (startImmediately) StartCutscene();
    }

    void Update() {
        if (running) UpdateCutscene();
    }

    public virtual void StartCutscene() {
        running = true;
    }

    public virtual void UpdateCutcene() {
    }

    public virtual void StopCutscene() {
        running = true;
    }

}

This is an empty cutscene. You’ll need to define a subclass for each actual cutscene, something like:

// Fades a light in over time.
public class LightCutscene : Cutscene {

    public Light light;
    public float duration;

    private float velocity = 0;

    public override void StartCutscene() {
        base.StartCutscene();
        light.intensity = 0;
    }

    public override void UpdateCutscene() {
        base.UpdateCutscene();
        light.intensity = Mathf.SmoothDamp(light.intensity, 1, ref velocity, duration);
    }

}

Then you can create a Loading scene, attach LightCutscene to the light source, set the Light, and check Start Immediately. When you run the scene, it should gradually turn on the light over 5 seconds.