> For the complete documentation index, see [llms.txt](https://upland-3d.gitbook.io/upland-3d/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://upland-3d.gitbook.io/upland-3d/fundamentals/materials.md).

# Materials

## Baking

* You should not use any light setup or HDRI for baking 
* All materials should be baked directly using the Ambient occlusion node (Avoid flat color or non-shaded areas)

<figure><img src="/files/iebSv2Dus3wflMG9M9aC" alt=""><figcaption></figcaption></figure>

## Details

* Structure: 4 Materials are mandatory for each NFT and LODs
* Structure Ornament: 5 Materials are mandatory for each NFT and LODs
* Landmarks: 1 Material mandatory
* Map Assets: 1 Material mandatory

## Requirements

* No duplicated materials
* Texture format: JPEG
* Materials should not use any shader (unless the category requires it)

<figure><img src="/files/PB8qAo9WeP3H4xZ9a6Jx" alt=""><figcaption></figcaption></figure>

## Water

* If you asset include any still water, please use the following image texture

<figure><img src="/files/fpZOBdaopZL3CwzKGC8T" alt=""><figcaption></figcaption></figure>

## Size relation

* Materials image size must follow this relation size:
  * 64x64
  * 128x128
  * 256x256
  * 512x512
  * 1024x1024
  * 2048x2048