# How do I use AI-generated 3D models, splats and video in Unity?

Download **3D models** from OTOY Studio as GLB and install Unity's free glTFast package (com.unity.cloud.gltfast) to import them, or use FBX from Meshy, Rodin or TripoSR remesh, which Unity reads natively. **Gaussian splats** download as PLY and render with the free, open-source UnityGaussianSplatting project by Aras Pranckevičius (MIT), which also reads SPZ. **Video** works directly: Unity's Video Player plays H.264 MP4 and VP8 WebM, including the transparent WebM that OTOY Studio's video compositor exports. Checked against OTOY Studio and Unity's documentation, October 2026.

## Formats, by asset

| From OTOY Studio | Download as | Into Unity |
|---|---|---|
| 3D model | GLB from every model, FBX from Meshy, Rodin and TripoSR remesh | GLB via the [glTFast package](https://docs.unity3d.com/Packages/com.unity.cloud.gltfast@6.0/manual/index.html) (free, Apache 2.0). FBX and OBJ import natively |
| Gaussian splat | PLY | Third-party [UnityGaussianSplatting](https://github.com/aras-p/UnityGaussianSplatting) (free, MIT; no longer actively developed) |
| World Labs Marble world | SPZ splat and collider GLB | UnityGaussianSplatting reads SPZ directly. Import the collider GLB with glTFast |
| Transparent video (UI, effects) | WebM (VP8) from the video compositor | Video Player, with alpha |
| Video | MP4 (H.264) | Video Player |
| Sprites and textures | PNG, including transparent PNG from GPT Image's Transparent background or 3D Snapshot | Native import |
| Voice and sound effects | MP3 (ElevenLabs), WAV (Stable Audio) | Native import |

## Steps: game props from prompts

1. In OTOY Studio, generate the prop with a text-to-3D or image-to-3D node, such as Meshy or Rodin.
2. Download FBX if the model offers it, or GLB.
3. In Unity, drop the FBX into Assets, or install glTFast and drop in the GLB.

## What to watch for

- Generated meshes can be dense and aren't rigged unless the model says so. Plan for decimation or retopology for real-time use.
- Splats are heavy on mobile. UnityGaussianSplatting targets D3D12, Metal and Vulkan.

## Related

- [AI assets in Unreal Engine](https://otoy.studio/answers/ai-assets-in-unreal-engine)
- [Text to 3D](https://otoy.studio/guides/text-to-3d)

_Last verified 2026-10-20. Prices and model lists come from OTOY Studio's billing configuration, exported 2026-10-20._