Your screen is a window.

Sit about an arm's length away and move your head. The camera finds your eyes and the room is redrawn from where you are, so the box sits behind the glass.

Works best full screen (F), one viewer, face lit from the front. Nothing is recorded or sent anywhere; tracking runs on your device.

Calibrate

Screen width (cm) Depth Webcam field of view (°) Smoothing Box size on screen Flip left/right Show camera

Measure your screen's visible width with a ruler for the most convincing depth. MacBook Air 13" ≈ 28.5, MacBook Pro 14" ≈ 30.4, 16" ≈ 34.5.