---

name: art-pipeline-nano-banana description: Use nano banana (Gemini CLI) to generate references and inputs for the deterministic 2.5D pipeline compatibility: opencode

Skill: Art Pipeline (nano banana as input generator)

Objective

Use nano banana to generate inputs (concept refs, mood boards, modular parts) while keeping final game assets deterministic via templates + palettes.

This repo does not accept “AI images dropped directly into game/assets” as final art.

What nano banana is allowed for

• Mood boards for biomes (to derive palettes)
• Concept sheets for props/characters (to guide modeling)
• UI style exploration (boxes, typography, icon language)

Where outputs must go

All generated images must land under:

• art/source/ai/nanobanana-output/

Prompting patterns (examples)

Biome mood board (Bubblegum Bay)

• Goal: palette direction (NOT final textures)
• Prompt template:
  • “Landscape-only JRPG biome mood board, low-poly toon, 4-band shading feel, playful pastel seaside town, calm ocean blues, candy accents, no text, 6 panels.”

Prop concept sheet

• “Turnaround concept sheet for a low-poly toon prop: , simple shapes, clean silhouettes, no text, white background, 3 views.”

UI exploration

• “Turn-based JRPG UI mockup, top HUD with portraits and HP/MP bars, bottom command menu boxes, cozy kid-friendly, no cassette theme, no text labels.”

Next step (convert to deterministic assets)

After generation:

1. Extract palette candidates (tools/python)
2. Build the prop/character in Blender using templates
3. Bake sprites/backgrounds via scripts
4. Validate outputs

Acceptance checks

• Any nano banana output used in production must have:
  • a recipe stub referencing it
  • a deterministic conversion step (Blender bake or modeling)