Improve load time of large `.reality` files

Question

So I have a large (138mb) reality file that I want to user to be able to interact with via Safari quick view.

So I have done the following:

<a
  href="...link to .reality file"
  rel="ar"
>
  <img />
</a>

now obviously since its such a large file it takes a few minutes to download, now the apple docs are not great when it comes to the web side of reality kit so I'm wondering if there is anything I can do to improve the experience for the user?

Answer 1

3D models for AR and VR apps are determined by polygon count and texture size, not MB (the size in MB is important when uploading/downloading a file over the internet). Apple documentation clearly says about assets for RealityKit:

...Keep the polygon count of your 3D asset's geometry below 100,000 polygons.

So, your asset contains significantly more polygons than needed. However, models with 25K polys (or lower) will load much faster. Another important aspect is textures. Apple says about that:

...For textures, don't surpass a size of 2048 x 2048 pixels (1024 x 1024 is preferable).

You can check a polygons count for .usdz files in Attributes Inspector in Xcode.

The size of the file House.usdz is 8.4 MB.