>My understanding is that technical Illusions tracking system is tied to the retro-reflective mat. The glasses see some LEDs on the mat and use that to determin

>My understanding is that technical Illusions tracking system is tied to the retro-reflective mat. The glasses see some LEDs on the mat and use that to determine their position and orientation. So the tracking is limited to the glasses being in view of the mat. If you turn around, you're no longer being tracked. Yeah, although to clarify, it's not the mat per se, it's the tracking marker. (Seen here, bottom picture, as it's the same one for the wand: https://www.kickstarter.com/projects/technicalillusions/castar-the-most-versatile-ar-and-vr-system/posts/1184549 https://www.kickstarter.com/projects/technicalillusions/cast... There's a wand PCB and a wand on there too, they aren't part of the marker.) The tracking marker is also covered in retro-reflective material, but it's not part of the mat itself. Relevant because there are clip-on adapters to turn the castAR goggles from AR to VR, and you don't need the mat for VR. It may not be the final version, as the tracking system has gone through a few upgrades and tweaks already according to the updates.