> For the complete documentation index, see [llms.txt](https://docs.viverse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viverse.com/polygon-streaming/integrations-and-plugins/polygon-streaming-unity-sdk/quick-start.md).

# Quick Start

### Option A: Use Prefabs (Recommended)

The SDK includes ready-to-use prefabs. Import them first:

1. Open **Window > Package Manager**.
2. Select **Polygon Streaming** from the package list.
3. Expand the **Samples** section and click **Import**.

Then in your scene:

1. Drag the **Stream Controller** prefab into your scene. Assign your scene camera to the **Viewer Camera** field.
2. Drag the **Streaming Model** prefab into your scene. Assign the `StreamController` to the **Stream Controller** field, and paste your XRG model URL into **Source Url**.
3. Press Play.

***

### Option B: Manual Setup

If you prefer to set up from scratch:

1. Create an empty GameObject, add the `StreamController` component, and assign your scene camera to **Viewer Camera**.
2. Create another empty GameObject where you want the model to appear, add the `StreamingModel` component, assign the `StreamController`, and paste your XRG URL into **Source Url**.
3. Press Play.

> If Viewer Camera is left empty, the SDK falls back to `Camera.main` at runtime and logs a warning.

The model begins streaming automatically on the first frame. No code required for basic usage.

***

### Scene Preview (Edit Mode)

The `StreamingModelPreview` component (added automatically) renders a lightweight preview of each model directly in the Scene View while in Edit Mode. Toggle it on or off in the Inspector.

***

### Required Layer (Occlusion Culling)

If occlusion culling is enabled (default), add a layer named exactly **PolygonStreaming** in **Edit > Project Settings > Tags and Layers**. The SDK auto-creates this layer in the Editor via `AutoAddLayerOnLoad`, but verify it exists if you encounter occlusion issues.

***

### Cache Settings

On first use, the SDK creates `Assets/Resources/SosCacheSettings.asset` automatically. This ScriptableObject controls memory and disk cache sizes. You do not need to create it manually.

***

### Next Steps

* [Stream Controller Settings](/polygon-streaming/integrations-and-plugins/polygon-streaming-unity-sdk/stream-controller-settings.md) — Configure LOD budgets, occlusion culling, and distance factors.
* [Streaming Model Component ](/polygon-streaming/integrations-and-plugins/polygon-streaming-playcanvas-sdk/plugin-usage/option-1-browser-extension/streamable-model-component.md)— Per-model options: materials, animation, VRM settings.
* [Static Model Streaming](/polygon-streaming/integrations-and-plugins/polygon-streaming-unity-sdk/static-model-streaming.md) — Code examples for runtime control of static models.
* [Animated GLB Models](/polygon-streaming/integrations-and-plugins/polygon-streaming-unity-sdk/animated-glb-models.md) — Play embedded animations with custom Animator Controllers.
* [VRM Avatar Streaming](/polygon-streaming/integrations-and-plugins/polygon-streaming-unity-sdk/vrm-avatar-streaming.md) — Expressions, spring bones, look-at, VRMA, and Mecanim.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.viverse.com/polygon-streaming/integrations-and-plugins/polygon-streaming-unity-sdk/quick-start.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.