# 3D Model

**3D Model View** is to help you to get an overview of the 3D model that you are using for your AR campaign. From here, you can upload a new 3D model anytime which would get reflected to the campaign immediately.

<table border="1" id="bkmrk-there-is-no-upper-li" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 99.8765%;"></col></colgroup><tbody><tr><td><p class="callout info">There is no upper limit restriction to upload a 3D model of any size. But for webAR, the smaller the 3D model size, the better the campaign performance will become.</p>

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##### 3D Model View for Surface AR

  
It is recommended for Surface AR to upload a GLB and a USDZ model whenever you want to change.

<div id="bkmrk-click-on-the-button-">Click on the button **Enable Animation for iOS** and USDZ uploading option will show up there.</div><div id="bkmrk-">  
</div><div id="bkmrk-but-you-can-only-upl">But you can only upload a GLB 3D model and skip uploading USDZ altogether.</div><div id="bkmrk--0">  
</div><div id="bkmrk-marvin-xr-can-auto-c">Marvin XR can auto convert the 3D model for iOS usage.</div><div id="bkmrk--1">  
</div><div id="bkmrk-please-follow-the-st">Please follow the steps [here](https://help.marvinxr.com/books/marvin-xr-help-manual/page/how-to-create-surface-ar-campaign#:~:text=Edit%20the%20AR,Android%20and%20iOS.) for achieving that.</div><div id="bkmrk--2"></div><div id="bkmrk-please-note-that-for"><table border="1" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 99.8765%;"></col></colgroup><tbody><tr><td><p class="callout warning">Please note that for animated 3D models, the above steps will not work</p>

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</div>[![image.png](https://help.marvinxr.com/uploads/images/gallery/2023-02/scaled-1680-/ek6image.png)](https://help.marvinxr.com/uploads/images/gallery/2023-02/ek6image.png)

##### 3D Model View for Image-based AR and Marker-based AR

  
For image-based and marker-based AR, you need to upload GLB 3D model only.

<div id="bkmrk-no-other-3d-model-fo"><span style="text-decoration: underline;">No other 3D model format</span> is necessary there unlike Surface AR.</div><div id="bkmrk--4">  
</div><div id="bkmrk-it-includes-static-o">It includes static or animated 3D models.</div>[![image.png](https://help.marvinxr.com/uploads/images/gallery/2023-02/scaled-1680-/2BIimage.png)](https://help.marvinxr.com/uploads/images/gallery/2023-02/2BIimage.png)

##### 3D Modle View for Eye Tracking AR

  
For Eye tracking AR, you need to upload **GLTF** model.

<div id="bkmrk-gltf-works-for-andro">GLTF works for Android, iOS and Windows (desktop mode).</div>[![image.png](https://help.marvinxr.com/uploads/images/gallery/2023-02/scaled-1680-/hvdimage.png)](https://help.marvinxr.com/uploads/images/gallery/2023-02/hvdimage.png)