> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lightcraft.pro/llms.txt
> Use this file to discover all available pages before exploring further.

# Importing objects

> Add 3D files to your scenes in supported formats and manage scene files

## Supported file formats

Spark Story supports the following 3D object file formats:

* **USD** — Universal Scene Description
* **USDZ** — Compressed USD package

## Adding object files

Add 3D files to your scene through the outliner panel. Imported files appear in the scene hierarchy and can be positioned, rotated, and scaled using the transform tools.

<video src="https://mintcdn.com/lightcraft/3Xm-D50zQRFYGSqo/images/spark/import-object.mp4?fit=max&auto=format&n=3Xm-D50zQRFYGSqo&q=85&s=5a3d7b8e7aef3b77c71553ed77823033" controls style={{ borderRadius: '0.5rem' }} data-path="images/spark/import-object.mp4" />

## File caching

Imported files are cached for faster loading on subsequent visits. Large assets may take a moment to load the first time they are added to a scene.

## Preparing assets for Spark Story

For best results, export USD objects with the MaterialX and USD Preview Surface materials when available.