Project Window > Assets Folder > Scene Folder > Create a Scene
Name it (e.g. Scene1, Scene2)

Open the new scene
SAVE
File > Build Profile > Scene List
Go to Scene List:
Two ways you can add the new scene
to the box of Scenes in Build e.g. belowAdd Open Scenes - often new scenes do not appear. then go back to Unity Editor and open the nethe new scene and save it.<aside> 🚨 You do NOT need to click Build and Run
</aside>


<aside> 🚨 You do NOT need to click Build and Run
</aside>
Create an empty gameObject that triggers Scene Transition
Create Empty> Name SceneColliderAdd Box Collider component to SceneCollider (triggers Scene transition)
Check on is Tigger
Reset the Box Collider’s Position 0, 0, 0 on Transform in the Inspector Window.
Relocate it on a desirable place where the player enters
Player Collides with this trigger and the scene transition will occur
Modify Box Collider Size: Go to Box Collider component and click Edit Collider


Locate SceneCollider at a desirable position. (below a game object that Player will get near by and trigger the scene change )
Child a targeted gameObject for scene transition
Pick and Child a gameObject under SceneCollider
I used a chair

Player
First Person Controller
Tag your player as Player
C# Script
a ScriptSceneTransitionAdd the NEW Scene’s name to("_____")
<aside> 🚨 Write the CORRECT name of the New Scene on your Script
</aside>
add the SceneTransition script to SceneColliderthe empty object

test Video