It has been ages since I logged in, that said, I lost my entire reply I typed out earlier while waiting for the video to upload to youtube giving an example of head tracking using a phone. I'll try to shorten it up a little and get this posted.I drifted away from cars for a bit and got into motorcycles, ended up finding Piboso at the beginning of GP Bikes development about the time I stopped playing LFS ("CTRA", the racing league, is long gone isn't it... sooo much has changed.) and recently, after many years wishing for it, gave it a shot to get head tracking working. Struggling to understand technology really makes me feel my age.Anyway, I use a combination of facetracknoir, TrinusVR (for the usb tethering) and I'm not sure if the other stuff, freepie, ht, etc. really has anything to do with it functioning, who knows, but I got a Samsung Galaxy S3 (internal gyro) to work as a head tracking unit rubber banded to my headphones. It is really smooth, and gives a sense of immersion I haven't felt since 2003 when I discovered LFS... has it really been that long??So in short, it works! If you have a phone with a gyro (pretty much required for smooth movement) and some spare time, the results are worth exploring. I'm sold on head tracking and I'm going to buy a pre-packaged unit to use with my 50inch TV and race rig so it gives a better sense of "being there", but for all intents and purposes, I would say the video speaks for itself, it functions as you would expect if not a little better that I was thinking it would.Any moto hooligans wondering what head tracking looks like on GP Bikes, here it is, my brother (been riding for 10 years at the time) bought a brand new 2011 CBR250R and did a track day (With less than 1000 miles on the bike. lol) at Blackhawk Farms Raceway, so I figured the coolest thing possible would be to replicate it with my first recorded video of head tracking on GP Bikes.Hope that helps to see what it looks like, I'm unsure I would be of any use answering technical questions about it as I am kind of a technological neanderthal, I tune carbs and build vintage motorcycles, so the computer knowledge extends as far as google can instruct me. There are some great DIY's on phone based head tracking and the best one I could find was for ARMA3, but applies all the same.