Can I make Google Cardboard with something other than cardboard?
You can absolutely make a viewer that isn’t cardboard. The types of materials we encourage are:
EVA or similar materials
To increase the chance of being granted the WWGC certification, feel free to send us the prototypes/designs before kicking-off full-scale production. (You can send the prototypes to the address listed in the same WWGC Best Practices kit.)