# Prepare Your Models

[Blender ](https://www.blender.org)is a free download available through the Blender Foundation.

* Remove everything from the scene except the 3D asset and any materials you will be packing into the file.

<div align="center"><img src="https://1909422608-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F4GudP3s7lhKkLuTADYnf%2Fuploads%2FTHUv5j8wabi6RHHTVIXr%2Fimage.png?alt=media&#x26;token=93d715b2-c016-4c26-94e8-a5796e508bd1" alt="Camera and light source have been removed from this blend scene"></div>

* Purge any orphan data from the scene. This unused data can interfere with cameras, lighting, and many other parts of the simulation.&#x20;
* To purge orphan data, navigate to display mode, select orphan data. Then select purge.

<div align="center"><img src="https://1909422608-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F4GudP3s7lhKkLuTADYnf%2Fuploads%2FcTmtGxDPyZj4gY87vKpc%2F049627388cf4f3293ad06db796e03da1.gif?alt=media&#x26;token=d2a29511-d1b2-457c-85e4-489667241062" alt="The orphan data being purged from a blend scene"></div>

* Last, make sure to pack all your data into the blend file.&#x20;
* Go to File, then External Data, then Pack All Into .blend