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

# 3D Files

> Retrieve 3D files from Cognite Data Fusion (CDF).

The **3D files API** provides direct access to processed 3D file data stored in CDF. You can retrieve individual files or navigate directory structures for a given 3D file ID. These endpoints are typically used by 3D visualization tools to load model geometry, textures, and associated resources.

## Key concepts

When CDF processes a 3D model revision, it generates optimized output files (geometry, textures, metadata) that are stored as 3D files. Each file has a unique ID and may contain sub-paths for directory-like navigation. Visualization clients use these endpoints to stream 3D content efficiently.

## What you can do

* **Retrieve** a single 3D file by its ID.
* **Navigate** directory structures within a 3D file using sub-paths.

<Note>
  These endpoints return binary data and are primarily intended for use by 3D rendering applications, not for direct user interaction.
</Note>