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Once you create the model (which you can learn about here), you need to get them ready to be put onto your website or application.Before the models can be used, they must be exported in a format used by your the platform of your choice.We recommend using the gLTF/gLB format as it works across most platforms (websites, Android, Magic Leap etc) while platforms like iOS require formats like USDZ to be used.Here’s how the Khronos group (the non-profit working on and maintaining the standard) describes the format —glTF (GL Transmission Format) is a royalty-free specification for the efficient transmission and loading of 3D scenes and models by applications. glTF defines an extensible, common publishing format for 3D content tools and services that streamlines authoring workflows and enables interoperable use of content across the industry.Put simply, the gLTF format is an open format for transferring & loading 3D scenes across multiple platforms without having to export multiple files each time you want to use it on a different device.“gLTF is the JPG for 3D.”This means that any model which is of the gLTF (or the accompanying gLB) format has a minimal file size and support for everything a 3D scene will need, including support for PBR (Physically Based Rendering) materials for realistic rendering, a great feature to have if you need to show your product in as close to the real one as possible.There have been many advancements made by companies that are a part of the Khronos group for the format.For example:Google started a glTF extension for Draco mesh and point cloud compression built for high compression, efficiency, and speed.Multiple 3D applications building in support for the format (Blender, Unity, Autodesk etc.,).Support for gLTF rendering on major browsers (Google Chrome, Mozilla, Safari).Support for the format on the ARCore platform by Google.With support and enhancements coming in for the gLTF format day-by-day, it’s a great bet to have your products distributed with the same specifications and standards to maintain a seamless experience across devices.Similar to the open gLTF format, Apple created an optimised 3D file format, called USDZ.It uses the innovative USD (Universal Scene Description) format build in collaboration with Pixar, to create a zero-compression ZIP archive, the former has been used by the animation giant for a number of years when working with 3D content, but the introduction of USDZ sees the technology now optimised for mobile devices.This means any iOS ranging from the iPhone 6 to the latest can easily open this format across a variety of applicationsShopify is already pushing out services on their platform that allow stores to take advantage of AR QuicklookWith Apple being a part of the Khronos and a contributing member, it may seem bizarre that they would create a competing standard to the gLTF format. But as we’ve seen multiple times in the past, Apple’s decisions have far-reaching consequences that influence entire industries.This means that if you want the 3D models to be compatible with Apple’s ARKit, you’ll need to convert it into the USDZ format, along with the gLTF format for the web.
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