4D Vision

See the fourth dimension.

Not a movie of a tesseract. A world you can touch.

Coming to the App Store

0.00

Shadows lie.
Sections tell the truth.

A projection shows the whole object compressed into fewer dimensions. A section shows only what actually meets your world. 4D Vision lets you compare both from one live simulation.

Projection

The whole object, cast into 3D.

Section

The exact 3D shape meeting your slice.

Learn by doing the impossible.

Predict what happens, perform the move yourself, and watch real four-dimensional math answer.

4D toy box

Grab and throw hyperspheres. Push one through W and watch it vanish from the current slice without leaving the world.

Fold a dimension

Fold six squares into a cube, then eight cubes into a tesseract.

The extra way out

Escape a closed 3D room by moving in the direction its walls cannot contain.

Captured from 4D Vision.

Real screens from the visionOS app: guided lessons, hands-on experiments, open Lab tools, and worlds designed for spatial computing.

4D Vision home screen with Learn, Play, Lab, and Worlds destinations — Home Four ways into the fourth dimension

Shadows Lie lesson comparing a tesseract projection with the object it represents — Learn Shadows Lie

Shape Explorer showing a tesseract with axes and hyper-glow overlays — Lab Shape Explorer

Slicer tool showing a three-dimensional cross-section through a 24-cell — Lab True 3D cross-sections

Hopf fibration rendered as nested linked tori in the Lab — Lab Hopf fibration

4D toy box with hyperspherical balls and controls for moving through W — Play 4D toy box

Fold a Dimension experiment midway through folding cubes into a tesseract — Play Fold a dimension

Slice Detective experiment asking the player to identify a hidden 4D object — Play Slice Detective

Worlds menu presenting immersive destinations for exploring four-dimensional geometry — Worlds Immersive destinations

An instrument for spatial thought.

Rotate in all six planes of 4D space. Sweep a hyperplane through a hypersphere. Inspect linked projections, sections, distances, and W positions without breaking the experiment apart.

6 independent rotation planes
1 shared simulation state
∞ viewpoints worth exploring

Walk into the experiment.

Leave the window behind. Enter immersive worlds where changing sections surround you, impossible architecture opens through W, and collisions transfer motion into the fourth dimension.

Cosmic ObservatoryChanging sections among the stars

Impossible ArchitectureA doorway with another way around

Pure GeometryOne solid, every view

4D Collision LabMomentum that can move through W