These are my notes for an alternate Quick Start Guide for Google Cardboard. I’m using a custom viewer made for the Nexus 7 (http://clintons3d.com/wp/?p=109) running Marshmallow 6.0 The original guide is here https://docs.unrealengine.com/en-US/Platforms/GoogleVR/QuickStart and my changes appear below.
1 - Google VR Project Creation
step 3 - use First Person instead of the Blank Project
This change is so there is something more than just an empty scene to start with.
2 - Google VR Project Setup
step 11 - minimum sdk version of 19 and target sdk of 24 instead of setting both to 24
step 12 - arm7 instead of arm64
These changes are needed to use a device running something older than Nougat. I think the arm64 and sdk 24 settings are mainly for Daydream phones
3 - Google VR Project Packaging & Deployment
step 1 - ETC1 instead of ASTC
https://docs.unrealengine.com/en-us/Platforms/Android/Reference
ASTC “Available on some devices at this point…”
ETC1 “Supported by all Android based devices…”
That’s it. All other instructions are the same as in the guide.