# Nano-Banana-Prompts — RACI-Board (Referenzbilder für Meshy)

Zweck: in **Gemini Nano Banana 2** **saubere, isolierte** Referenzbilder des RACI-Boards
erzeugen → in **Meshy** (Image-to-3D) übertragen. Wichtig für Meshy: **nur das Objekt**,
plain Hintergrund, **leeres** Board (keine Figuren/Karte), klare Geometrie.

Workflow: Nano Banana (Look/Form) → Meshy GLB → **CAD-Finisher** schneidet die exakten
Passungen (Chip Ø40,6 · Sockel Ø25,3 · Kartenschlitz) + scharfe Labels rein (siehe
`README.md` / `raci-board.py` für die Maße).

> Hinweis: Bildmodelle verzählen Sockel gern und vermatschen Text. Nano Banana liefert
> **Form & Look**; **Präzision** (Maße, scharfe Schrift) kommt im CAD-Finisher.

---

## Bausteine (in jeden Prompt kopieren)

### A) Stil-/Isolations-Block (immer voranstellen)
```
Single isolated 3D-printable board-game part, centered, filling ~80% of the frame, on a seamless plain light-grey studio backdrop. NOTHING else in the scene: no table, no miniatures, no cards, no dice, no hands, no text overlays, no logos, no props, no environment, no strong reflections. Soft even studio lighting, minimal soft contact shadow only. Near-orthographic lens for accurate proportions. Matte single-color blue plastic (#2f80c9). Clean, precise, CAD-like surfaces with crisp edges.
```

### B1) Objekt-Block — MIT Beschriftung
```
The object is a single ROUND flat disc board (thin: thickness ≈ 1/15 of its diameter), ~210 mm across, with a softly chamfered rim. KEEP PROPORTIONS ACCURATE. In the EXACT CENTER: one large recessed circular WELL whose diameter is about ONE QUARTER of the board; the word "DESIGN" is engraved on the FLOOR of this central well, centered (and nowhere else). Around the center: ONE ring of ten shallow identical circular sockets — each socket LARGE, about TWO-THIRDS the diameter of the central well — grouped into FOUR sectors separated by clear empty gaps: 3, 1, 4 and 2 sockets (total 10). The TOP edge has an upright thin rectangular CARD-HOLDER SLOT (empty, slightly tilted back); the single ACCOUNTABLE socket sits at the top, its label engraved directly BELOW the card-holder slot. All FOUR sector labels — RESPONSIBLE, ACCOUNTABLE, CONSULTED, INFORMED — engraved in the SAME small, subtle font size, each near its own sector. No other text anywhere. Empty board: no tokens, no figures, no card inserted.
```

### B2) Objekt-Block — TEXTFREI (für Meshy; Schriften später im CAD)
```
The object is a single ROUND flat disc board (thin: thickness ≈ 1/15 of its diameter), ~210 mm across, with a softly chamfered rim. KEEP PROPORTIONS ACCURATE. In the EXACT CENTER: one large recessed circular WELL whose diameter is about ONE QUARTER of the board, smooth and blank inside. Around the center: ONE ring of ten shallow identical circular sockets — each socket LARGE, about TWO-THIRDS the diameter of the central well — grouped into FOUR sectors separated by clear empty gaps: 3, 1, 4 and 2 sockets (total 10). The TOP edge has an upright thin rectangular CARD-HOLDER SLOT (empty, slightly tilted back). Absolutely NO text, NO letters, NO numbers, NO engraved words or symbols anywhere — all surfaces completely blank. Empty board: no tokens, no figures, no card inserted.
```

### Kamera-Zeilen (eine anhängen) — Multi-View-Set für Meshy
- **Vogelperspektive (Top-down):** `Camera: exact top-down orthographic view straight from above; the disc reads as a perfect circle (no ellipse), perfectly centered; all ten sockets, the four sector gaps and the central well clearly visible.`
- **Seitenperspektive (Side):** `Camera: straight side elevation at table height (orthographic, no perspective distortion), showing the thin disc profile, the chamfered rim, the recess depths and the upright card-holder standing above the top edge.`
- **Untersicht (von unten):** `Camera: view from directly underneath, showing the flat closed bottom of the disc and the chamfered rim; no sockets on the underside.`
- **Hero 3/4 (optional):** `Camera: three-quarter view from front-right, ~35° elevated, full object centered in frame.`

> **Meshy-Multi-View:** Erzeuge dasselbe Objekt in **Top-down + Seite + Untersicht** (+ optional Hero),
> identischer Maßstab/Hintergrund → das gibt Meshy die beste 3D-Rekonstruktion.

---

## Tipps
- **Konsistenz:** Erst Hero generieren; für weitere Ansichten das Hero-Bild als Referenz
  mitgeben + „*same exact object, identical design/proportions/colors, plain background,
  only change the camera angle to …*".
- **Isolation verschärfen** (falls Würfel/Karten/Tisch auftauchen): „*pure empty background,
  the object only*".
- **Text unterdrücken** (B2): „*no typography, no writing of any kind; smooth blank surfaces only*".
- **Meshy:** Single-Image → Hero; Multi-Image → Hero + Top-down (+ Front/Rück), alle gleiches
  Objekt/Maßstab. Export als **GLB**.