PRIMAVERA SPATIAL DISPLAY LABRead the research ↗

Try v2: two views with camera-based head tracking ↗

ONE JEWEL · FOUR WAYS TO SEE DEPTH

A little window into space.

Compare the same brooch in motion, side by side. These are depth illusions on your screen; a true light-field display needs additional optics.

Preparing views…
Camera off

Camera frames stay on your device. Tap Start head tracking to request camera access.

Tracking off · Position not calibrated

Loading the original brooch (18 MB). The controls and research are ready below.

01

Motion parallax

A moving viewpoint

Look around the edges

The jewel stays still as the view shifts behind a fixed window. Drag here or move the shared slider.

No accessory neededStart head tracking above to use your camera.

Automatic motion simulates a viewer moving sideways.

02

Changing highlights

A moving light

Watch the facets catch light

The view stays fixed while studio lighting moves. This material cue is ordinary 3D shading, not a captured light field.

No accessory needed

Phone tilt or the slider controls the lighting angle.

03

Stereo pop-out

Left eye · Right eye

Depth through your glasses

Two eye views of the brooch approaching and turning. Use a stereoscopic viewer, or choose Red / cyan for glasses.

Compare one change

Switching keeps the current movement and distance. Pause motion to compare a still view.

Motion and contrast

Same distance, different timing.

Forward movement

Try the two distances used in the reaching study.

About these distances

The study presented familiar objects 30 or 40 cm from the eyes, with a large screen 90 cm away and shutter glasses. This brooch starts with estimated screen size and viewing distance, using red/cyan glasses. You can adjust the estimate or enter measurements. Its apparent distance needs your judgment. Read the study.

Viewing and glasses settings

Adjust until the two eye views form one clear object.

Close your right eye. Adjust until the duplicate fades through the red lens.

Close your left eye and adjust for the cyan lens. Stop if a dark outline appears.

Red lens over the left eye
04

Reflection pyramid

Four rotated images

Give the image a place to float

Four copies reflect from a clear pyramid. The reflected images appear inside it; this is Pepper’s ghost, not volumetric holography.

Clear reflection pyramid needed
TRY IT IN YOUR ROOM

Place Primavera on your table.

On an iPhone, open this page in Safari and tap the image to launch Apple AR Quick Look. You still focus on the phone’s screen.

USDZ download: approximately 12 MB. On other devices, this link downloads the model.

View Primavera in your space
WHAT THE PAPERS ACTUALLY SUPPORT

Depth cues are not a light-field display.

“Light field mimicry” is a useful informal description, not one established research method. A normal iPhone can change a rendered view with motion, shade materials, show stereo images, or drive an optical attachment. Software alone does not add independent focus planes to its screen.

PubMed and PubMed Central index or host research; they do not certify this demo. Viewing setup starts with estimates of screen size and viewing distance; you can replace them with measurements. Head movement remains approximate. Accommodation, fatigue, and motion-to-photon latency are not measured here. The frame counter reports browser animation intervals only. NeRF and Gaussian splatting are scene representations, not upgrades to a screen’s optical capabilities.

Set up the view

The view already uses an estimate. Adjust it if needed; measuring is optional.

These are starting assumptions, not detected measurements. Phone and tablet widths refer to portrait orientation.

Use a ruler (optional)

Measure this line between the end marks. Leave the field blank to use the screen estimate above.

Use your pupillary distance if you know it. Otherwise, 64 mm is an estimate.

Settings stay in this browser. Adjust them after changing screens. Follow my head tracks relative movement; it does not measure your distance in centimeters.

Match your glasses

Color sample
Adjust this gray

Match brightness, even when the colors look different. Keep screen brightness steady through all six steps. If the starting brightness already matches, choose Next color. Entries are saved so you can return to them.