使用谷歌的新模型 Nano Banana，将动漫转真人是一大玩法。
但经常遇到某些 CG 图，无论怎么写提示词都没法很好的转成真人 cosplay 图片的情况。
需要尤其强调真实感，需要不断叠甲。但对于某些图片，这种方法也不太管用。要么就是还是输出动漫风格的图片，要么就是有很浓的 3D 效果。
最近研究出了一种新的思路，似乎挺有效的。
简而言之就是将步骤拆分：
- 提取角色，生成背景为绿幕的真人 cos 照
- 提取场景，生成铅笔绘制的分镜稿
- 将两张图片合并，并附加一些提示词辅助
三个步骤所使用的 prompt 分别是：
Generate a real-life photo of an Asian cosplayer portraying this character, with highly realistic skin texture. The cosplayer’s hairstyle, accessories, and clothing must match the character’s.
The cosplayer is standing in the front of a green screen. The full body is visible. The cosplayer is holding nothing.
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Convert the CG to a storyboard drawn by 2B black pencil. Generate the image.
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Make the cosplayer from image 1 cosplaying the scene from the storyboard of image 2. The cosplayer's posture and angle should be the same with image 2, meticulously recreating the iconic scene from image 2. The photo is captured in reality, emphasizing hyper-realism and avoiding any hint of 2D, anime, or 3D rendering.
[这里加入一些修正prompt]
例如这张图片，自己尝试如果直接生成的话，无论如何都没法得到很好的真人效果（来源：「魔法少女的魔女审判」游戏 CG）：
第一步，生成绿幕角色：
第二步，生成分镜稿：
第三部，合并，贴上附带了补充 prompt 的完整 prompt：
Make the cosplayer from image 1 cosplaying the scene from the storyboard of image 2. The cosplayer's posture and angle should be the same with image 2, meticulously recreating the iconic scene from image 2. The photo is captured in reality, emphasizing hyper-realism and avoiding any hint of 2D, anime, or 3D rendering.
Remove the green screen. The background is dangling limbs of cotton dolls with a dark environment. The cosplayer's face is very afraid.
最终效果：
尝试另一张比较难办的 CG，也是基本可以达成还可以的效果：
注意，第一步生成绿幕的时候，如果有角色的全身立绘那就最好不过了：
补充提示词是：The water is clean. The cosplayer puts both hands on the inner surface of the tank. The cosplayer has a face with curious expression looking outside.
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