Augmented Reality fashion
Choose "3D body" template or the "Body Mesh" template
When you're working with 3D models:
Add your custom 3D objects to the "Abstract Gear" section in the scene hierarchy
When you've chosen the "body mesh":
Change the material of the body mesh object in the scene hierarchy.
Publish your lens, get the markercode and scan it with the Snapchat AR app: