I've not tried anything with motion-tracking before, so I thought I'd have a quick look at it. It's actually really simple to do something that looks quite effective - I just ripped out the main view of my 3d planet-maker project and replaced the follow-cursor movement with motion-detection. All it does here is translate the amount of motion detected on the stage, and its direction, into movement of the objects. I think it could add a whole new dimension to certain types of 3d game - for example, you could 'look around' obstacles, etc... :) It's not accurate for tracking the actual position of the head, but I did have a go at that, and it wasn't too bad - see HEAD-TRACKING: https://scratch.mit.edu/projects/72290026/
