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AI 出图 Prompt 指南

本指南提供了在使用 Agnes AI(或其他图像生成 AI)生成像素艺术素材时的 Prompt 编写策略和最佳实践,旨在帮助开发者获得符合项目美术总纲和精灵图规范的图像。

1. 核心 Prompt 结构

一个有效的 Prompt 应包含以下几个关键部分:

  1. 风格描述:明确指定像素艺术风格。
  2. 内容描述:详细描述要生成的物体或场景。
  3. 视角:指定透视角度。
  4. 尺寸:指定图像的像素尺寸。
  5. 颜色/光影:指导 AI 使用项目调色板和光影风格。
  6. 背景:明确要求透明背景。
  7. 质量/细节:强调像素完美和游戏资产属性。

通用风格前缀 (STYLE_PREFIX)

为了保持风格一致性,建议在所有 Prompt 前添加以下通用前缀:

Dark pixel art style, top-down perspective, low saturation, muted dark tones, clean pixel edges, no anti-aliasing, no blur, inspired by Stardew Valley, dark blue-black background palette (#0b1220), transparent background PNG, pixel perfect, game asset

2. 针对不同素材类型的 Prompt 示例

2.1 建筑精灵 (Building Sprites)

  • 目标尺寸:处理后通常为 64x96, 96x128, 128x128 等。

  • Prompt 示例

    • 住宅 (House)
      ${STYLE_PREFIX}, Cozy wooden cabin, 64x96 px, warm light from windows, thatched roof, small garden fence, flower box, pixel shadow below, warm brown wood tones (#8b5a2b), simple two-story village house
    • 酒馆 (Tavern)
      ${STYLE_PREFIX}, Rustic tavern, 96x128 px, two-story, wooden beams, large door, hanging lantern, barrel outside, warm amber glow from windows, pixel shadow below, medieval drinking establishment
    • 市场 (Market)
      ${STYLE_PREFIX}, Open air market stalls, 128x128 px, multiple vendor stalls with canvas awnings, crates and barrels, vegetables and goods displayed, pixel shadow below, village marketplace

2.2 地形瓦片 (Terrain Tiles)

  • 目标尺寸32x32 像素。

  • Prompt 示例

    • 草地 (Grass Tile)
      ${STYLE_PREFIX}, Lush green grass tile, 32x32 px, top-down view, variants: light grass, dark grass, patchy grass, seamless tileable, vibrant green tones (#5a8a2d), transparent background, pixel perfect
    • 水域 (Water Tile)
      ${STYLE_PREFIX}, Calm lake water tile, 32x32 px, top-down view, 4-frame animation loop, gentle wave ripple, deep blue tones (#5b9bd5), seamless tileable, transparent background, pixel perfect, frame sequence

2.3 角色精灵 (Character Sprites)

  • 目标尺寸32x48 像素。

  • Prompt 示例

    • 程序员 (Programmer)
      ${STYLE_PREFIX}, Male programmer character, 32x48 px, walking animation, 8 frames, facing south, wearing glasses and a hoodie, carrying a laptop bag, pixel shadow below, game asset
    • 商人 (Merchant)
      ${STYLE_PREFIX}, Female merchant character, 32x48 px, walking animation, 8 frames, facing east, wearing a long cloak and carrying a basket, pixel shadow below, game asset

2.4 装饰物精灵 (Decoration Sprites)

  • 目标尺寸:根据物体大小而定,例如树木 32x48,灌木 32x32

  • Prompt 示例

    • 橡树 (Oak Tree)
      ${STYLE_PREFIX}, Large oak tree, 32x48 px, top-down view, lush canopy with dark green leaves (#7cba3d), thick brown trunk (#8b5a2b), pixel shadow below, transparent background, pixel perfect, game asset
    • 路灯 (Lamppost)
      ${STYLE_PREFIX}, Vintage lamppost, 16x48 px, top-down view, cast iron, warm glow from lantern, pixel shadow below, transparent background, pixel perfect, game asset

3. Prompt 编写技巧

  • 具体化:越具体的描述,AI 越能理解您的意图。例如,不要只说“房子”,要说“Cozy wooden cabin, warm light from windows, thatched roof”。
  • 关键词:使用 pixel perfect, game asset, transparent background PNG, no anti-aliasing, no blur 等关键词来强调像素艺术的特性。
  • 负面 Prompt:如果 AI 经常生成不想要的内容,可以尝试使用负面 Prompt (Negative Prompt) 来排除,例如 blurry, realistic, 3d, smooth, cartoon
  • 迭代优化:AI 生成是一个迭代过程。从一个简单的 Prompt 开始,根据生成结果逐步添加或修改描述,直到满意为止。
  • 尺寸指导:在 Prompt 中明确指定尺寸 (64x96 px),可以帮助 AI 生成更接近目标比例的图像,减少后期处理的难度。

作者:Manus AI 日期:2026年7月10日

Released under the MIT License.