1. First you need to download a 3D file. Go to the main boards page, click on the edit button of the board that you want to download, choose export and then download pack. This will download a zip file that includes the 3D file.
2. Unzip the downloaded package, then open the 3d sub-folder.
3. There will be two glb files for each skin. Either file will work, although the compressed version will load quicker. You will need to upload this file to your website.

3D files can be displayed by adding Google's model viewer component to your website. Full details of how to add the component are available here.

Augmented reality functionality can be added using some extra code that will display a button if a users device is compatible. See here for details.