antigravity-skills-reference/plugins/antigravity-awesome-skills-claude/skills/ai-studio-image/references/prompt-engineering.md

AI Studio Image — Guia Avancado de Prompt Engineering

Principio Fundamental (da Google)

"Describe the scene, don't just list keywords."

Paragrafos narrativos e descritivos sempre superam listas de palavras-chave porque aproveitam a compreensao profunda de linguagem do modelo.

Templates Oficiais

1. Cenas Fotorrealistas

A photorealistic [tipo de enquadramento] of [sujeito], [acao/expressao],
set in [ambiente]. Illuminated by [iluminacao], creating [humor/atmosfera].
Captured with [camera/lente], emphasizing [texturas/detalhes].

2. Mockups de Produto

High-resolution product photograph of [produto] on [superficie].
Lighting: [setup] to [proposito]. Camera angle: [angulo] showcasing [feature].
Ultra-realistic, sharp focus on [detalhe].

3. Material Educacional

Create a [tipo visual] explaining [conceito] styled as [referencia].
Show [elementos-chave] and [resultado]. Design resembles [exemplo],
suitable for [audiencia-alvo].

4. Texto em Imagens

Create a [tipo] for [marca] with text "[texto exato]" in [estilo fonte].
Design should be [estilo], with [esquema de cores].

Limite para Imagen: 25 caracteres, ate 3 frases distintas. Para texto complexo: use gemini-pro-image.

Tecnicas de Humanizacao

A Camera de Celular

O segredo para imagens humanizadas esta na simulacao da camera de celular:

• Profundidade de campo rasa: Lentes pequenas criam bokeh natural
• Ruido de sensor: Especialmente em ambientes com pouca luz
• Distorcao de lente: Bordas levemente distorcidas em lente wide
• Auto-exposicao imperfeita: Areas levemente sobre/sub-expostas
• Granulacao: Textura organica que adiciona vida a imagem

Expressoes Genuinas

Evite poses de estudio. Descreva momentos reais:

• "caught mid-laugh while talking to a friend"
• "looking down at phone with slight smile"
• "concentrating on work, didn't notice camera"
• "turning to look at something off-camera"

Ambientes Reais

Descreva cenarios com vida:

• "coffee shop with other customers blurred in background"
• "kitchen with used cutting board and half-chopped vegetables"
• "desk with coffee stain ring, scattered pens, and post-its"
• "park bench with leaves on ground, pigeons nearby"

Terminologia Fotografica para Prompts

Iluminacao

• Golden hour, blue hour, overcast diffused
• Window light, mixed indoor lighting
• Backlit with lens flare
• Open shade, dappled forest light

Lentes e Camera

• 85mm portrait lens, 35mm wide angle
• f/1.8 shallow depth of field
• Smartphone camera, iPhone quality
• Natural bokeh, creamy background

Composicao

• Rule of thirds, off-center subject
• Leading lines, natural framing
• Negative space, breathing room
• Layered depth: foreground/midground/background

Textura e Detalhe

• Visible skin pores and natural blemishes
• Fabric texture, material quality
• Environmental texture: wood grain, concrete, brick
• Water droplets, steam, atmospheric particles

Niveis de Complexidade

Prompt Simples (Bom)

Mulher jovem tomando cafe em cafeteria, luz natural da janela

Prompt Intermediario (Melhor)

Young woman sitting by a large window in a cozy coffee shop, holding a
warm latte, morning sunlight creating soft shadows, genuine relaxed smile,
wearing a casual sweater, taken with smartphone

Prompt Avancado (Excelente)

A medium close-up photograph of a young woman in her late 20s sitting at
a wooden table next to a large cafe window. She is holding a ceramic latte
cup with both hands, steam visible, looking slightly to the side with a
genuine warm smile. Soft morning sunlight streams through the window creating
natural shadows across the table. She wears a casual cream knit sweater with
slightly pushed-up sleeves. Her hair is naturally styled, not perfect.
Background shows blurred cafe interior with other customers. Taken with a
smartphone camera, natural depth of field, no professional lighting or flash.
Real skin texture visible, subtle freckles. The image feels warm, authentic,
and completely unposed — like a friend snapped this photo across the table.

Erros Comuns a Evitar

1. Prompt muito curto → Resultado generico
2. Lista de keywords → Menos natural que narrativa
3. Pedir "perfeicao" → AI gera algo que parece artificial
4. Esquecer o contexto → Fundo generico/vazio
5. Nao especificar camera → Modelo assume DSLR profissional
6. Pele "perfeita" → Uncanny valley, parece falso
7. Iluminacao de estudio → Mata a naturalidade
8. Poses de modelo → Stock photo vibe

Features Avancadas

Multi-Turn (Gemini)

Use chat para iterar:

1. Gere a imagem base
2. "Move the coffee cup to the left"
3. "Make the lighting warmer"
4. "Add a small plant in the background"

Reference Images (Gemini Pro)

Envie ate 14 imagens de referencia:

• 6 para objetos (alta fidelidade)
• 5 para pessoas (consistencia de personagem)

Thinking Mode (Gemini Pro)

O modelo "pensa" antes de gerar — cria composicoes intermediarias para refinar o resultado final. Ideal para cenas complexas.

Search Grounding (Gemini Pro)

Gera imagens baseadas em informacoes em tempo real da web.