Augmented reality (AR) allows you to view 3D models in the real world using your mobile device's camera. All models are available in AR through the Sketchfab mobile app on both iOS and Android.
However, downloadable models are also available in USDZ format, which means they can be viewed "natively" in AR on iOS devices.
How do I view USDZ files in AR?
Go to the model page of a downloadable model.
Scroll down and tap Download 3D Model.
Tap Download next to "Augmented Reality Format (USDZ)". This opens a link to the USDZ file, which will load in Apple Quick Look.
Tap the AR icon.
Then, follow the instructions on-screen to place the model in AR. Once it's placed, you can pinch with two fingers to scale and swipe with one finger to move the model.
Why is USDZ not available or does not look as expected?
USDZ and Apple Quick Look have some limitations that are important to keep in mind:
- Point Clouds are not supported, and will not be available in USDZ.
- Quick Look does not have a Shadeless mode, so 3D scans and other models set to Shadeless may look darker than expected.
- Vertex Colors are not supported, so models that depend on Vertex Colors will not look correct.
- Morph animations are not supported, and only one animation track is supported.
- Double sided rendering is not supported, so all models are rendered single sided. This is not an issue for models that are closed volumes, but it will not work well when models have planes or faces that can be visible from both sides.
- Performance considerations
- Textures: models with large textures or many textures will not load. Downsizing textures make them work, but the actual limitation t is unknown for now. Apple recommends textures no bigger than 2048×2048 pixels for best performance.
- Vertex/Polygon count: some models cannot be loaded because they have too many vertices/faces. The limit is not clearly defined yet, but 500k seems to be a good rule of thumb. Apple recommends no more than 100k for best performance.
- Animation: Apple recommends animations no longer than 10 seconds.