Build settings and scene order in Unity

Introduction

Build settings let you choose which scenes to include when making your game. Scene order decides which scene starts first and how the game moves between scenes.

When you want to decide which parts of your game to include in the final build.

When you want the game to start from a specific scene, like a main menu.

When you want to control the order scenes load during gameplay.

When testing different scenes without building the whole game.

When organizing your game flow from start to finish.

Syntax

Unity

1. Open Unity Editor.
2. Go to File > Build Settings.
3. In the Scenes In Build list, add scenes by dragging them or clicking 'Add Open Scenes'.
4. Arrange scenes by dragging them up or down to set the order.
5. The scene at index 0 is the first scene that loads when the game starts.

The first scene in the list (index 0) is the one Unity loads first when you run the game.

You can add or remove scenes anytime before building your game.

Examples

The game starts at MainMenu, then can load Level1 and Level2 in order.

Unity

Scenes In Build:
0: MainMenu.unity
1: Level1.unity
2: Level2.unity

The splash screen shows first, then the main menu, and settings can be loaded later.

Unity

Scenes In Build:
0: SplashScreen.unity
1: MainMenu.unity
2: Settings.unity

Sample Program

This script loads the next scene in the build order when LoadNextScene is called. It checks if there is a next scene and loads it, or logs a message if none remain.

Unity

/* This is a Unity C# script to load the next scene based on build order */
using UnityEngine;
using UnityEngine.SceneManagement;

public class SceneLoader : MonoBehaviour
{
    public void LoadNextScene()
    {
        int currentIndex = SceneManager.GetActiveScene().buildIndex;
        int nextIndex = currentIndex + 1;
        if (nextIndex < SceneManager.sceneCountInBuildSettings)
        {
            SceneManager.LoadScene(nextIndex);
        }
        else
        {
            Debug.Log("No more scenes to load.");
        }
    }
}

Important Notes

Always make sure your scenes are added to the Build Settings or they won't be included in the game.

Scene order affects how you can load scenes by build index in scripts.

You can reorder scenes anytime to change the game flow without renaming files.

Summary

Build Settings control which scenes are included in your game build.

The first scene in the list is the starting point of your game.

Scene order helps manage game flow and scene loading in scripts.