Module 2

3D Asset Creation or Selection
3D asset creation is an important part of making Fashion Lenses. If you completed Module 1 of this course, you should have decided between using an Asset provided by the Lens Studio Asset Library, purchasing one online, or making your own asset. If you already create 3D assets or design virtual fashion items, move on to the section titled “Understanding External Body Mesh.” 
If you don’t want to purchase or make your own 3D garment, check out Lens Studio’s Asset Library. When using Lens Studio’s Asset Library, type in “Try On” in search to view all available 3D models.
If you would like to purchase an asset on a third-party asset store, you will find that most marketplaces offer free and premium assets. When using third party asset stores, be aware of asset compatibility. To avoid the need to adjust the asset’s mesh, look for assets with a garment mesh of A-pose or T-pose (module 4 covers A-pose vs T-pose). Assets may need modification in order to best perform in Lens Studio and dynamically deform to the Body Mesh. You might need to adjust the asset's polycount and mesh to name a few. When adjusting an asset's polycount, keeping it under 50,000 triangles will ensure that your model displays smoothly across the widest variety of devices. When adjusting Body Mesh, please refer to Lens Studio’s reference model
NOTE: always check usage rights of assets that you purchase and be aware that purchased assets may need some modification to reduce file size. Lens Studio recommends keeping assets under 2 MB per model.
If you want to create your own garment/accessory, but you do not yet know how to create 3D assets, check out learning materials of software we shared in Module 1. You can find tutorials on YouTube or documentation by searching Google. You can spend as much or as little time on creating your asset. As you dive into asset creation, remember that you will need to create an External Body Mesh. To do so, use a reference model provided by Snapchat. Try to keep your 3D model under or around 2MB per model. If you are interested in having more than one garment or accessory in your Lens, consider optimizing asset size. While Lens Studio doesn’t have a strict asset size limit, the maximum Lens size is 8MB. For better performance on lower power devices, we recommend lenses less than 4MB.
Once you are familiar with how to create a Lens, you can spend more time in 3D creation tools and make more complex 3D garments/accessories for your future Lens.

Foundations of Fashion Lenses for virtual try-on

Snap AR already enables people to make smarter shopping decisions or imagine products that do not exist outside of the virtual space. Fashion Lenses are a new territory to explore in AR, whether your passion is in designing a new line of digital-only clothes, or allowing others to try on an existing piece of clothing in AR without ever having to enter a store. 
Creating a Fashion Lenses for AR requires thinking of how to make a garment or an accessory you are bringing into AR look as realistic as possible for all users. What does it mean in practice? This means thinking about how a clothing item or an accessory is designed so that it can dynamically shape to users, regardless of body types. This course covers a few main components that allow dynamic fitting and realistic garment overlay on users — External Body Mesh, Occlusion, and background inpainting.