noir 是对 Prompt 要求最严的电影风格。它的味道其实只用几样东西，但每样都得写清楚：硬阴影、单一主光、空气里的一缕烟或雨、克制的动作、还有安静。出片不稳，几乎都是这几样里某一样写得糊了。下面 10 条每条只锁一个 noir 习惯：逆光门口、百叶帘条纹、雪茄火光、礼帽阴影，让模型每次只做一件事。
一个好视频 Prompt 通常包含什么
每条 noir Prompt 都按这五层写：
- 镜头：
anamorphic 35mm、50mm prime、85mm。Anamorphic 给的是 noir 那种横向拉长感。 - 光源状态：一个方向明确的硬光主光。例如
single bulb overhead、backlit from doorway、key from window blinds camera-left。不要写dramatic lighting。 - 机位运动：写名字而且慢，例如
static medium、slow dolly in、slow tilt up。noir 极少动。 - 颜色：
desaturated black and white、warm tungsten and deep black、cool blue night and amber key。高反差，最多两色。 - 主体克制：5-8 秒只做一件事 — 抽一口雪茄、看一眼、缓慢下楼。绝对不要两件事。
时长 5-8 秒。6 秒最稳；超过 8 秒，脸开始漂。
10 个可直接复制的视频 Prompt 模板
1. 侦探逆光门口
使用场景: 悬疑短片开场
A man in a long trench coat and fedora stands still in a doorway, completely backlit by warm tungsten light from the room behind him, his face entirely in silhouette. Static medium shot, anamorphic 35mm, deep black foreground and warm amber key behind, no camera move. 6-second clip.2. 百叶帘条纹审讯
使用场景: 犯罪片、noir 预告
Close-up of a man at a wooden table in a small office at night, hard horizontal shadow stripes from venetian blinds cross his face, single hard key from camera-left through the blinds. 85mm lens, static medium close-up, desaturated palette with one warm key. 7-second clip, no head movement.3. 雪茄火光近景
使用场景: 角色介绍、noir 空镜
Tight close-up of a cigar in a mans hand at a dark bar, slow drag pulls glowing ember brighter, smoke curls up through a single cool rim light from behind. 85mm, static close-up, deep black background with single warm ember glow and cool blue rim. 6-second clip, only the cigar moves.4. 礼帽帽檐遮眼
使用场景: 角色亮相、片头序列
Static medium close-up of a man in a fedora hat at night, brim casts a hard shadow completely covering his eyes, only his mouth and jaw are lit by a single hard key from above. Anamorphic 35mm, desaturated black-and-white palette with subtle warm key, no camera move. 5-second clip.5. 雨夜小巷湿地追逐
使用场景: noir 惊悚片开场
Wide low shot of a wet city alley at night, slow dolly forward, single sodium streetlight at the far end, hard shadows of fire escapes on the brick walls, falling rain visible against the streetlight. Anamorphic 35mm, deep black walls and warm sodium key. 7-second clip, no subject in frame.6. 投币电话亭夜晚
使用场景: 剧情节点、氛围短片
A man in a dark suit stands in an old phone booth at night holding the receiver, single warm tungsten bulb inside the booth is the only light source. Static medium shot from across the street, 50mm prime, deep blue night exterior and warm amber interior. 7-second clip, no dialogue, only the receiver pressed to his ear.7. 烟雾爵士酒吧慢推
使用场景: 年代片场景、情绪剪辑
Slow dolly forward through a smoky jazz bar at night, silhouetted figures at tables in the foreground, a single spotlit musician at the far end. Anamorphic 35mm, deep black foreground and warm amber spotlight in the distance, visible smoke in the beam. 8-second clip.8. 酒店长廊远影走路
使用场景: 悬疑场景、叙事短片
Wide static shot down a long empty hotel hallway at night, a single ceiling sconce casts a hard pool of warm light every few meters, a distant figure walks slowly away from camera. 35mm, deep black ceiling and floor with warm pools, desaturated palette. 7-second clip.9. 蛇蝎美人下楼梯
使用场景: 角色亮相、戏剧化开场
A woman in a long dark dress slowly descends a curved staircase at night, single hard key from a chandelier above casts her shadow down the steps. Static low-angle wide shot, anamorphic 35mm, deep black background with one warm key, only her descending motion. 7-second clip, no face close-up.10. 桌上手枪单灯泡
使用场景: 剧情细节、片头引入
Static top-down close-up of a revolver lying on an old wooden table, a single bare bulb swings gently overhead casting moving hard shadows across the gun. 85mm, locked static frame, warm tungsten key and deep black surround, only the swinging shadow moves. 6-second clip.容易踩的坑
- 只写
dramatic shadows不写光源 — 模型会把对比度降下来。 - 让相机自由移动 — noir 的镜头要么锁死要么极慢。
- 一冷一暖光源都要 — 选一个主色温，再加一个点缀。
- 写
an emotional face— noir 的脸通常一半在阴影里，不需要表情。 - 6 秒塞太多动作 — noir 一镜只做一拍。
下一步怎么改得更好
- 加
hard shadow edges, high contrast, no fill light，对比度立刻硬起来。 - Veo 上加
ambient: distant car horn, slow ticking clock，可以一次出片自带 noir 音效。 - 写
desaturated to near-black-and-white with one warm key，比直接写”黑白”更稳，颜色更有质感。 - noir 主光的味道是靠光束里的烟和尘 — 加
visible smoke in the key beam, dust particles in the cone of light。 - 配对生成”宽景小巷”加”雪茄特写”两条，能剪成 12 秒一段，调色保持一致。
常见问答 (FAQ)
Q: 我写了”硬阴影”，怎么阴影还是软的？
A: 把光源也写明白。Single hard key from camera-left, no fill light, hard shadow edges 比单独写”硬阴影”管用得多。
Q: 不想拍纯黑白怎么保留 noir 感？
A: 用 desaturated palette with one warm tungsten key。保留 noir 的对比度，但还有一个暖色调子在锚定年代感。
Q: Sora / Veo / Kling 哪个最适合 noir？
A: Sora 在风格化硬阴影上最强。要带同步脚步声、钟表声、压抑对白用 Veo。东方年代夜景 Kling 更对味，西方 noir Kling 偏弱。
Q: 为什么近景脸总是糊？
A: 一半在阴影一半在光的脸正好踩在模型分辨力的边界。要么逆光做剪影，要么主光打满，不要让明暗交界线刚好穿过眼睛。
Q: noir 镜头最短能多短？
A: 5 秒就够一拍。超过 8 秒人脸会失稳，烟雾也会重复。