Google Earth VR "comfort mode" limited FOV in unity?

[createthiscom]

Hello,

I’d like to implement something like Google Earth VR’s limited field of view “comfort mode” during flight. It basically limits the visual field to a small circle in front of the user during movement, then relaxes the FOV to be fullscreen when movement stops.

Any ideas on how to implement this in Unity?

Thanks.

[createthiscom]

To answer my own question, this seems to do a pretty good job implementing what I want:

Unity VR Tutorial: How To Cure VR Motion Sickness like Eagle Flight or Google Earth VR!

I think the shader used in Google Earth VR is a parabola, not a circle vignette, but a vignette is pretty close for minimum effort.