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

# Prompt guidelines

> Input requirements and specifications for Marble world generation

## Text prompts

* Up to 2,000 characters
* Describe a location, such as "A warm, rustic cabin living room with a glowing stone fireplace, cozy leather sofa, wooden beams, and large windows overlooking a snowy forest."

## Images

* Recommended resolution: 1024 on the long side
* Recommended aspect ratio: 16:9, 9:16, or anything in between
* Max file size: 20 MB
* Supported formats: png (recommended), jpg, webp
* See [Image prompt guide](/marble/create/prompt-guides/image-prompt) and [Multi-image prompt guide](/marble/create/prompt-guides/multi-image-prompt).

## Panoramas

* full 360 degree equirectangular projection, in 2:1 aspect ratio.
* Recommended resolution: 2560 pixels wide
* See [Panorama prompt guide](/marble/create/prompt-guides/pano-prompt).

## Video

* Max file size: 100 MB
* Max duration: 30 seconds
* Supported formats: mp4, mov, webm
* See [Video prompt guide](/marble/create/prompt-guides/video-prompt).

## 3D structure uploads ("Chisel" import)

* Max file size: 100 MB
* Supported formats: glb, fbx