SHOWCASE PRODUCT · PROTOTYPE PROGRAM

TriPoint Hologram Stage

A floating, interactive AI character above a 150 × 150 mm illuminated pad — built as a Pepper's Ghost optical chamber inside a converted Prusa MINI enclosure, rendered by tripoint-engine3d and voiced by TriAi. An optical illusion done honestly: buildable, repairable, and fully software-controlled by TripointOS.

How the stage works

A roof-mounted high-brightness display faces down into the chamber and renders four synchronized views of one scene on black — one per quadrant, each rotated 90°. Four 1 mm clear PETG trapezoids arranged at 45° reflect their quadrant toward each side of the enclosure, so the character appears to float above the pad from every direction.

Physical stack (bottom → top)

Electronics bay (PC, GPU, PSU, PDU)140 mm

Stage deck — diffuser + LED perimeter20 mm

Optical chamber — 4× PETG at 45°120 mm

Display plenum — face-down 15.6″ panel50 mm

Top exhaust + cable allowance25 mm

Total used of 500 mm clear height355 mm · fit check PASS

Four-view render signal

Live preview of the actual roof-display signal: one scene, four cameras (0° / 90° / 180° / 270°), quadrants on black — exactly what the reflector chamber needs.

150 × 150 mmInteractive character pad with opal diffuser and WS2812 perimeter lighting

4 × 45°Clear 1 mm PETG trapezoids (60 mm / 300 mm edges, 169.7 mm slant) form the optical chamber

15.6″ roof display400+ nit IPS/OLED mounted face-down with safety tether; 60 fps target, 30 fps minimum

$1,641 planning totalComplete BOM incl. 15% contingency — reuses your backup PC and GPU

ESP32-S3 stage controlLEDs, fans, sensors on framed serial JSON with hardware thermal backstop at 60 °C

<100 ms touchTouch/voice/gesture to animation via tripoint-input; TriAi actions on a typed schema

Build program — five gated phases

Every phase ends in an acceptance gate; no gate, no next phase. The full engineering runbook ships in the repo as docs/HOLOGRAM-ENCLOSURE-RUNBOOK.md with the complete BOM, wiring rules, and commissioning tests.

0Plan & bench

Inventory the reused PC, survey the enclosure, 30-min stress test. Gate: stable on open bench, dimensions recorded.

1Frame & cooling

Removable 2020 subframe, isolated electronics bay, 4× 140 mm filtered airflow. Gate: square, reversible, air path proven.

2Optics & stage

Cardstock mockup → PETG trapezoids → chamber over the lit pad, roof display mounted. Gate: reflections align from all four sides.

3Power & control

Listed PDU, fused 5 V branches, grounded panels, ESP32 + sensors + independent thermostat. Gate: earth continuity <0.1 Ω.

4–5Software & commissioning

HologramApp on tripoint-engine3d, TriAi character schema, kiosk .pcu, 18-test commissioning incl. 2-hour thermal soak. Gate: 10/10 cold boots to character idle.

Architecture decision

Option	Verdict	Reality
Four-view reflection chamber	BUILD FIRST	Best cost/impact; multi-side viewing on existing GPU + TripointOS
Side-panel projection film	Phase 2	UI overlays on enclosure glass; needs calibrated projectors
Looking Glass 16″ light field	Optional premium	True multi-view display, ~$3,000, RTX 2070+ guidance
Spinning LED fan	Rejected	Mechanically hazardous and incompatible with a reachable pad

Honest engineering note: this is a Pepper's Ghost illusion, not free-space volumetrics — and we say so. Safety is non-negotiable: no PC hardware in a heated printer volume, no fog or mist near electronics, guarded fans, fused low-voltage branches, and an independent over-temperature cutoff that software cannot override.

Try the OS apps that drive it Forge a character in TriForge Get an account