# Scene Caching

## General

When loading a scene you can specify in the SceneLoadData whether to AutomaticallyUnload the scene when all Clients unload or leave the scene as an observer.\
\
When Unloading the Scene you can override the AutomaticallyUnload options by setting the ServerUnloadMode.

## Examples

```csharp
// When Loading Scenes.
SceneLoadData sld = new SceneLoadData("MainScene");
sld.Options.AutomaticallyUnload = false;

// When Manually Unloading Scenes.
// Whatever you set the ServerUnloadMode to here will override the AutomaticallyUnload
// setting you used when loading the scene earlier.
SceneUnloadData sud = new SceneUnloadData("MainScene");
sud.Options.Mode = ServerUnloadMode.KeepUnused;
```

## Host behaviour

In situations where the Hosts Server needs to keep a scene loaded, but the Hosts Client was requested to unload that scene. Instead of unloading, the Hosts Client will be removed from the scene using the observer system updating the Clients [**Scene Visibility**](/docs/guides/features/scene-management/scene-visibility.md).\
\
As Host, the Server and Client share the same instance of loaded Scenes and Game Objects. If it were to actually unload a scene from the Host Client, it would also unload on the server.

{% hint style="danger" %}
A **Scene Condition** must be set in the **ObserverManager** for you to utilize the ability to have the server keep a scene loaded, and the hosts client not see the objects in that scene.
{% endhint %}

{% hint style="warning" %}
This usually means that every GameObject with a mesh will have to have a NetworkObject attached if you want the Host Client not to visualize the scene.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://fish-networking.gitbook.io/docs/guides/features/scene-management/scene-caching.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.