The use of reticles, which is a circular cursor that indicates what the user is looking at, that they use this to click on an element or to sustain a gaze. Sound is actually a fundamental part of immersive experiences and a virtual reality. What about the user's height? Like, how tall does the user stand in a VR environment? That can have some serious impacts on realism and immersion. And cognitive load, like, how do we best introduce users to VR experiences and show them use cases on board them? We find that cognitive load needs to be really, really, really low in these early VR experiences.