> For the complete documentation index, see [llms.txt](https://docs.echo3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.echo3d.com/unreal/using-the-sdk.md).

# Using the SDK

## SDK Contents

<figure><img src="/files/mCzehfMOhxpkSf2X1xGQ" alt="Screenshot of unzipped sdk contents"><figcaption></figcaption></figure>

The unzipped SDK contains two items:

* **`echo3D`** : Plugin source files
* **`user_readme.md`**: Readme file containing step by step instructions to install and use the SDK via either C++ or Blueprints

Open the `user_readme.md` file and follow the enclosed instructions to install the plugin into your project and stream assets via C++ and Blueprints.