Google Cardboard for manufacturers basics Overview of Google Cardboard Designing a Cardboard-inspired viewer Creating and testing a Cardboard-inspired viewer Overview of creating and testing your viewer Specifications for viewer design Tolerances for quality-control testing Generating a QR viewer profile Overview of generating a QR viewer profile Step-by-step instructions Designing and placing a QR viewer profile Overview of designing and placing a QR viewer profile QR code specifications Branding your viewer Overview to naming your viewer Publicizing your viewer Troubleshooting I get an error when trying to create my Viewer Profile Can I make Google Cardboard with something other than cardboard?