Thanks! I'm meaning rotating the view from the default position. The video I've attached shows what I mean; interestingly, as you can see the helmet does appear if I look back and up.
But otherwise, the neck hole is all seen. I'd like the helmet to be always visible, including in these examples, not just when I look back and up.
However, maybe if I edit the files from the video you posted, the helmet will also appear in these cases. Thanks for the tip.
I don't use vr, use trackir but might as well try experimenting.