Think of each unique Scene file as a unique level. Additionally, the Scene A Scene contains the environments and menus of your game. This saves on wasted rendering operations, and can improve runtime performance. You can take advantage of this effect by disabling real-time shadow rendering for distant GameObjects.
This is both because the shadows appear smaller on the screen, and because distant GameObjects are usually not the focus of attention. More info See in Glossary become less noticeable the farther the GameObjects are from the Camera. A GameObject’s functionality is defined by the Components attached to it. Shadows from GameObjects The fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. More info See in Glossary up to which Unity renders real-time shadows. The output is either drawn to the screen or captured as a texture.
Use the Shadow Distance property to determine the distance from the Camera A component which creates an image of a particular viewpoint in your scene.