悬浮产品居中拍摄，包装展示

{
"image_generation_request": {
"subject_settings": {
"product_placeholder": "[在此插入产品名称]",
"positioning": "绝对居中、悬浮、漂浮、悬于半空中",
"framing": "全视角、无裁剪、产品必须完全在画面内、边缘留有充足的空白"
},
"environment_and_background": {
"background_color": "#000000",
"background_type": "纯粹的虚空、无限深邃的黑色",
"elements_to_exclude": [
"灯光箱",
"柔光箱",
"支架",
"底座",
"平台",
"文字",
"水印",
"道具",
"表面反射",
"摄影棚设备"
]
},
"texture_and_material_blending": {
"primary_finish": "阳极氧化的黑曜石金属，带微观颗粒质感",
"secondary_finish": "高光泽流体铬面",
"accent_texture": "受 Mac Pro 启发的精密加工半球状格栅，3D 格栅通风图案",
"optical_effects": "单原子光色散、边缘棱镜衍射、缥缈的全息光泽"
},
"lighting_and_color_palette": {
"key_colors": [
{ "name": "纯黑", "hex": "#000000" },
{ "name": "电光靛蓝", "hex": "#4B0082" },
{ "name": "酞蓝", "hex": "#000F89" },
{ "name": "光谱虹彩", "description": "薄膜干涉形成的彩虹高光" }
],
"lighting_style": "硬边轮廓光、明暗对比（明暗法）、高对比度、尖锐镜面高光、不使用环境补光"
},
"negative_constraints": {
"strict_exclusion": "画面外、产品被裁切、边缘模糊、三脚架、灯架、地面、桌子、地面阴影、光晕图标、发光方框、版权文字、标志、杂乱背景、灰色调、混乱的几何形状"
},
"technical_specs": {
"style": "超写实 3D 渲染",
"engine_hints": "Octane Render、光线追踪、8k、Unreal Engine 5、电影级照明"
}
}
}