Overview

Amazon’s Virtual Try‑On lets shoppers preview eyewear on a digital replica of their face before buying. To join the program, sellers must provide 3D models that follow Amazon’s strict glTF specifications, node naming rules, material settings, and orientation standards. Meeting these technical criteria is essential for the try‑on to display correctly and to avoid rejection during the upload process.

Key Points

• File format requirement — Models must be delivered as glTF (.glb or .gltf) files; a typical submission might be named summer2024_sunglasses.glb.
• Exact node naming — Each component—frame, left temple, right temple, left lens, right lens—needs its own mesh and must use Amazon’s prescribed labels such as frame, L_Temple, R_Temple, L_Lens, R_Lens.
• Continuous‑lens exception — Products like ski goggles that have a single wraparound lens use a simplified scheme, omitting separate left/right lens nodes and labeling the lens simply as Lens.
• Transparency extension — Lens meshes must include the KHR_materials_transmission glTF extension, set the alpha mode to OPAQUE, and apply a transmission factor between 0 and 1 (e.g., 0.85 for a lightly tinted lens).
• Orientation rule — The front of the glasses must point along the positive Z‑axis, and the model’s origin should sit at the midpoint of the bridge where the glasses rest on the nose.

How Virtual Try‑On Works

1. Model upload — Sellers submit the glTF file through Amazon’s Seller Central portal; for example, uploading classic_aviator.glb triggers an automated validation routine.
2. Node parsing — Amazon’s engine reads each node name; a node called L_Temple tells the system to attach that mesh to the shopper’s left ear, while R_Lens aligns the right lens with the corresponding eye socket.