I used Unity's layers system (more on that in sibling comment: https://news.ycombinator.com/item?id=24367460 https://news.ycombinator.com/item?id=24367460). I

I used Unity's layers system (more on that in sibling comment: https://news.ycombinator.com/item?id=24367460 https://news.ycombinator.com/item?id=24367460). I have zero experience with WebVR, but solution you linked seems sensible.