I'm am looking at the plausibility to make/hack an eyepiece HUD out of a reflective piece of curved glass/plastic, a camera, and a viewfinder/mini-screen. It would be nice for it to all mount to either a modest sized helmet or a tight head strap. I remember having an old '90s video game that you would tie around your head with the LCD screen facing down, and there was a piece of plastic that would reflect the screen into your eye. I would like to mimic something similar, where a viewfinder or other small, lightweight screen is reflected into my one eye, but both eyes can still see my surroundings. Once calibrated with a camera, for example, I could do any sort of computer vision and display it on the HUD. With this base, the possibilities are endless, ranging from avionics (e.g. add some gyros, accels for orienting the HUD) to paintball/airsoft (gps mapping). Does anyone have any experience in relation to a good material for the reflective piece, any ideas about what viewfinder to use. Also, if this is even plausible in terms of optics and the nature of human vision. I think it would be awesome to eventually use this to control an aeroquad realtime while on the move.