3D 卡通头像生成

使用用户上传的图像作为源，将人物转换为风格化的 3D 角色，同时精确保留身份、面部结构、姿势、发型、服装和整体构图，与照片中所示完全一致。结果应明显类似于真实人物。

视觉风格为风格化 3D 角色，具有柔和的极简卡通 3D 美学，灵感来自类似 Pixar 的视觉效果，但更加极简，类似玩具人偶渲染和干净的产品式角色设计。应在不改变人物现实外貌的前提下，偏向风格化而非写实。

皮肤应呈现为光滑的哑光塑料质感，具有柔和、均匀的纹理和轻微的次表面散射。面部特征应在形式上保持简化，但需忠实于原始图像。表情应保持与源照片一致的中性且自然状态。

照明应干净且可控，类似于影棚柔光箱布光，具有非常柔和的阴影、低对比度和微妙的高光。背景应为纯色 {{background_color}}，无渐变。

相机视角应为正前方，采用中等近景构图，类似于 50mm 镜头效果，无畸变。输出质量应为高分辨率，边缘清晰，无噪点，风格一致性强，并具有明显非照片级写实的最终效果

Use a user-uploaded image as the source and convert the person into a stylized 3D character while preserving identity, facial structure, pose, hairstyle, clothing, and overall composition exactly as shown in the photo. The result should clearly resemble the real person.

The visual style is a stylized 3D character with a soft minimal cartoon 3D aesthetic, inspired by Pixar-like visuals but more minimal, toy-figure renders, and clean product-style character design. The balance should favor stylization over realism without changing the person’s real-world appearance.

Skin should appear as smooth matte plastic with a soft, uniform texture and gentle subsurface scattering. Facial features should remain faithful to the original image while being simplified in form. The expression should stay neutral and natural to the source photo.

Lighting should be clean and controlled, similar to a studio softbox setup, with very soft shadows, low contrast, and subtle highlights. The background should be a solid {{background_color}} with no gradient.

The camera should feel front-facing with a medium close-up framing, similar to a 50mm lens, with no distortion. Output quality should be high resolution with clean edges, no noise, strong style consistency, and a clearly non-photorealistic finish