AI图片质量忽高忽低,问题在提示词。模糊指令,比如“一个女孩”,AI不知道画什么。但结构清晰、细节丰富的提示词,能让出图效果稳定。

一个有效的提示词,包含这几部分:
[画质词] + [主体] + [环境] + [构图] + [风格] + [参数]
这是它的工作原理。
画质词
把这类词放最前面,是给图片定个高标准。
常用词有:masterpiece (杰作), best quality (最高质量), 8k wallpaper (8K壁纸), ultra-detailed (超细节), photorealistic (照片级真实感)。
主体
画面的核心,描述要具体。
比如画个骑士:
- 模糊描述: a knight (一个骑士)
- 具体描述: a majestic female elf knight, clad in shimmering silver armor engraved with dragon patterns, wielding a crystal longsword that glows with faint blue light. (一位雄伟的精灵女骑士,身着雕有龙纹的闪亮银甲,手持一把散发着幽蓝光芒的水晶长剑。)
细节越多,AI越清楚画什么。

环境
环境提供背景和氛围。
比如骑士在森林:
- 模糊描述: in a forest (在森林里)
- 具体描述: in an ancient, enchanted forest at twilight, volumetric mist drifting between giant luminous mushrooms. (在黄昏时分的古老魔法森林里,体积雾在巨大的发光蘑菇间飘荡。)

构图
用摄影术语控制画面视角。
比如:cinematic shot (电影镜头), dramatic angle (戏剧性角度), wide angle shot (广角镜头), from above (俯视视角)。
风格
指定艺术风格,决定图片观感。
可以指定流派,如 cyberpunk (赛博朋克);或指定艺术家,如 style of Hayao Miyazaki (宫崎骏风格);也可以指定渲染质感,如 Unreal Engine 5 (虚幻引擎5)。
负面提示词
用来告诉AI不画什么。能有效避免畸形手指、崩坏面部等常见错误。
这组通用负面提示词,直接用:
(worst quality, low quality:1.4), deformed, ugly, bad anatomy, extra limbs, poorly drawn hands, poorly drawn face, watermark, text, error
(最差品质、低品质:1.4、畸形、丑陋、人体结构错误、多余的肢体、画得差的手、画得差的脸、水印、文字、错误)
8种壁纸风格范例
下面是8种流行风格的提示词,分正负向,可以直接用或修改。
1. 赛博朋克
- 核心词: Neon lights, holographic ads, futuristic megacity, cyborg, rain-slicked streets, dystopian
- 正向提示词: masterpiece, 8k wallpaper, a lone cyborg detective in a trench coat, standing on a crowded street in a futuristic Tokyo at night, neon signs reflecting in the wet asphalt, holographic koi fish swimming through the air, cinematic lighting, cyberpunk aesthetic.
- 负向提示词: (worst quality, low quality:1.4), sunny, daytime, nature, clean, minimalist.
2. 国风仙侠
- 核心词: Chinese ink wash painting, ethereal, misty mountains, traditional hanfu, swordsman, wuxia
- 正向提示词: masterpiece, best quality, a graceful swordsman in flowing black hanfu, meditating on a solitary bamboo raft, cruising down a tranquil river surrounded by towering misty mountains, style of traditional Chinese ink wash painting, serene and poetic atmosphere.
- 负向提示词: (worst quality, low quality:1.4), photorealistic, vibrant colors, city, modern, heavy armor.
3. 二次元幻想
- 核心词: Makoto Shinkai style, Ghibli style, anime screencap, beautiful detailed sky, emotional, nostalgic
- 正向提示词: masterpiece, anime wallpaper, a high school girl in a uniform, standing at a seaside train station in the late afternoon, the sky is a breathtaking spectacle of clouds and golden hour light, cinematic, Makoto Shinkai style, a sense of gentle melancholy.
- 负向提示词: (worst quality, low quality:1.4), 3d, realistic, blurry, dark, horror.
4. 史诗奇幻
- 核心词: Epic fantasy, enchanted ruins, glowing magic, dragon, Lord of the Rings style, dramatic atmosphere
- 正向提示词: masterpiece, best quality, epic fantasy art, an ancient, moss-covered stone golem awakening in a lost jungle temple, its eyes glowing with magical energy, shafts of light breaking through the canopy, style of Lord of the Rings concept art.
- 负向提示词: (worst quality, low quality:1.4), cute, cartoon, modern city, sci-fi, peaceful.
5. 科幻宇宙
- 核心词: Galaxy, nebula, massive spaceship, alien planet, vast universe, starfield, cosmic
- 正向提示词: masterpiece, 8k space wallpaper, a colossal ring-shaped space station orbiting a vibrant gas giant, smaller ships docking and departing, a beautiful nebula in the background, style of “Dune”, hyper-detailed, sense of immense scale.
- 负向提示词: (worst quality, low quality:1.4), earth, people, blurry, painting, close-up.
6. 治愈系自然
- 核心词: Breathtaking landscape, serene, golden hour, national geographic photography, hyperrealistic
- 正向提示词: masterpiece, best quality, stunning hyperrealistic photograph of the Patagonia landscape at sunrise, a turquoise lake perfectly reflecting the snow-capped mountains, golden light hitting the peaks, National Geographic award-winning photography.
- 负向提示词: (worst quality, low quality:1.4), people, buildings, drawing, fantasy elements, pollution.
7. 情绪感人像
- 核心词: Cinematic portrait, soft lighting, emotional expression, character design, shallow depth of field
- 正向提示词: masterpiece, best quality, ultra-detailed cinematic portrait of an old craftsman in his workshop, face full of wrinkles and wisdom, soft window light illuminating dust particles in the air, a gentle smile, shallow depth of field.
- 负向提示词: (worst quality, low quality:1.4), ugly, deformed face, two heads, blurry, cartoon.
8. 抽象艺术
- 核心词: Abstract art, colorful liquid marble, geometric patterns, vibrant, dynamic, 3d render
- 正向提示词: masterpiece, 8k abstract wallpaper, a beautiful explosion of swirling liquid chrome and iridescent colors, frozen in motion, creating elegant and complex patterns on a black background, macro photography, hyper-detailed.
- 负向提示词: (worst quality, low quality:1.4), simple, plain, figurative, recognizable objects, dull colors.
不同平台的特定指令
Midjourney
Midjourney用参数调图,写在提示词末尾。
- –ar <比例>: 定宽高比。电脑壁纸用–ar 16:9,手机用–ar 9:16。
- –s <0-1000>: 风格化。值越高,艺术感越强,但可能偏离描述。
- –c <0-100>: 混乱度。值越高,四张初始图差异越大,适合找灵感。
Stable Diffusion
Stable Diffusion控制更精细。
- 选模型: 出图的基础风格由大模型(Checkpoint)决定。画二次元就选二次元模型,画写实就选写实模型。
- 调权重: 能给关键词增减影响。用(keyword:1.2)能把词的权重提20%。用[keyword]是降权重。
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