Depth Window: Head-Tracked Off-Axis 3D Perspective Viewer with STL, OBJ, and 3MF Support
Preparing your window
Move your mouse to look around
Close one eye for a stronger 3D effect
Try uploading your own 3D model — STL, 3MF, OBJ
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Drop your 3D model
STL · OBJ · 3MF
Settings
Tracking
Head Tracking
Sensitivity1.5
Smoothing0.85
Show Camera Preview
Room
Grid Color
Grid Opacity0.6
Grid Density12
Room Depth8
Object
Scale1.0
Y Rotation0°
X Tilt0°
Display
Fullscreen
Loading model...
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Depth Window
Head-Tracked 3D Perspective
Your screen becomes a window into 3D space. Move your head and watch the perspective shift — objects appear to exist behind and in front of your display. Drop any STL, OBJ, or 3MF file to see your own 3D models in head-tracked perspective. Uses off-axis projection and webcam face tracking. All processing happens in your browser — nothing is uploaded.
Keyboard Controls
Arrow keys — Rotate selected model W A S D — Move model (forward, left, back, right) Q / E — Move model up / down + / − — Scale model larger / smaller Tab — Cycle between dropped models R — Randomize grid color F — Toggle fullscreen
Depth Window uses off-axis projection, a technique first demonstrated by Johnny Chung Lee. Your webcam tracks your face and the app computes an asymmetric frustum so the screen acts like a real window into a 3D room. The vanishing point follows your head, not the center of the screen.
Do I need a webcam?
No. The webcam gives the best experience, but mouse position works on desktop and the gyroscope works on mobile. The webcam adds true head-tracked perspective that feels magical — try it if you can.
What 3D file formats can I use?
Drop STL, OBJ, or 3MF files directly onto the viewport. Models are automatically centered and scaled to fit the room. Design something in MakerChip Maker and view it here.
Is my camera data private?
Yes. All face tracking happens locally using MediaPipe. No video leaves your device. The camera feed is processed in your browser and discarded every frame.
Why does it look better with one eye closed?
This is a monoscopic 3D effect — one viewpoint for both eyes. Your two eyes see slightly different angles which creates binocular conflict. Closing one eye eliminates that, making the depth illusion dramatically more convincing.
Does it work on phones and tablets?
Yes. On mobile, the gyroscope drives the perspective as you tilt your device — like a window you can tilt to peek inside. The full head tracking effect works best on desktop or laptop with a webcam.
Is this free?
Completely free. No account, no download, no install. Runs entirely in your browser. Depth Window is a free browser-based alternative to TheParallaxView.