I've tried to track multiple (two) points, when trying to get the distance of the two spots to the camera.

Since the points will swap if one gets brighter then the other, I couldn't get this to work as it should. That happens a lot if you use two torches or two white spots on a paper, depending on the angle to the camera.

So if two spots could be identified in an absolute way, so that it always knows which point it is, it would help a lot for mocap or any other precise tracking.

I think there is a function that determents the points color, but since that can change with the points brightness, I don't think it would solve the problem.