so, for instance, if i bend my elbow like this, you can't bend it past a certain point of extension. rules like that are written into the system. we can work out where your feet are when you're moving around the volume. what that allows us to do is basically create a map of the volume and be within it. there are six cameras in this setup, and that's enough to track about five people in this space, although they may bump into each other a bit. but it can be scaled to whatever size you want and you can choose the resolution. so, for example, if you were to use a football pitch, it could track about 22 people. the reason we can scale that up to a full football—sized pitch, for instance, is we up the resolution of the camera to say, like, 12k, and that can be much further away and much higher up, but still maintain that pixel density of the person. the system isn't live. videos need to be filmed, then processed first, so it's ready for sd garments a few hours later, but the workflow is getting faster.