# 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 — arranged in FOUR EQUAL sectors forming a symmetric CROSS — straight radial divider lines at the 12, 3, 6 and 9 o'clock positions split the ring into four equal quarters; within each sector the sockets are spread EVENLY. Counts: upper-left 3 (RESPONSIBLE), upper-right 1 (ACCOUNTABLE), lower-right 4 (CONSULTED), lower-left 2 (INFORMED) — total 10; the whole layout looks perfectly symmetric. A thin rectangular CARD-HOLDER SLOT (~70 mm long, ~5 mm wide, recessed deep, empty, slightly tilted back) sits at the very TOP on the 12 o'clock divider line, in the gap between the two upper sectors; ACCOUNTABLE's label is engraved just below the 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 — arranged in FOUR EQUAL sectors forming a symmetric CROSS — straight radial divider lines at the 12, 3, 6 and 9 o'clock positions split the ring into four equal quarters; within each sector the sockets are spread EVENLY; counts 3, 1, 4 and 2 (total 10); perfectly symmetric layout. A thin rectangular CARD-HOLDER SLOT (~70 mm long, ~5 mm wide, recessed deep, empty, slightly tilted back) sits at the very TOP on the 12 o'clock divider line, between the two upper sectors. 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**.