Starts in Walk at the world's own ground level, with your eye 1.75 m above it, at a speed scaled to the world so crossing it takes about a minute. Your avatar stays human-sized whatever the world's size. Drag on the view to move and look. Dragging is how you walk, turn and look around in every viewer this checker runs on. A world whose size cannot be measured still walks; only the size is withheld. Audio stays off until you press Enable audio — browsers block sound until a real click, and autoplaying someone's world at whatever volume they mastered it would be rude anyway.