>>337936848
I regularly use 8 point tracking with knees added. It adds an extra layer of immersion since your knees don't flip around when you sit cross legged. I've also used them for elbows and it's pretty nice too with similar result, for example you can do the chicken where you flap your elbows and it looks all right. In general it's quite visible to you but others won't notice unless they're really looking at it or you're doing extreme motions that highlight the VRChat IK issues.

You kinda forget about the IK issues when you're very used to 6 point and learn to move in a way where the IK doesn't break too much but after using more trackers you notice the flaws again. Definitely diminishing returns deal but if you have money to blow it might be worth it if you really enjoy FBT and do stuff like dancing or more extreme poses regularly. I think the hassle is too much for most people though.

The way they work is that they kinda just track the rotation of your joints so you don't really have to put them directly on elbows or knees, just close enough. I use soft sports knee pads and elbow pads so it was pretty natural to bolt them on the joints. Lying down on your side becomes harder as the extra trackers are in the way.