实战案例：用AI提示词拍摄手工植鞣牛皮马鞍包主图，从皮料毛孔到养色变化全套电商图

你是一位高端皮具产品摄影师。为「鞍上」植鞣牛皮马鞍包建立产品视觉规范：

1. 产品卡（每张图严格一致）：
   - 包型：经典saddle bag马鞍包，半圆翻盖，廓形挺括有骨架
   - 皮料：意大利植鞣牛皮，原色（cognac干邑色），可见天然毛孔与轻微生长纹，表面有哑光油脂感不是漆皮亮面
   - 缝线：马鞍针法（saddle stitch），手缝微斜的针脚，米白色蜡线，针距有手工的轻微不均匀
   - 五金：做旧黄铜（antiqued brass），不是亮银不是亮金，锁扣是旋转挂钩
   - 尺寸感：女生单肩背到胯部

2. 8张图清单：主图45度角、正面平铺、皮料毛孔微距、缝线特写、五金特写、上身图、咖啡馆场景图、养色一年后对比图
3. 布光：45度侧上方柔光箱+左侧反光板补光，保留皮料明暗过渡
4. 避坑：塑料皮、漆皮亮面、机缝均匀线迹、镀铬五金、包型软塌、变形翻盖

[主图]
Professional e-commerce product photo of a handcrafted saddle bag made of Italian vegetable-tanned cognac leather, structured half-moon flap silhouette with firm body, visible natural pores and subtle growth marks on matte waxy surface, hand-sewn saddle stitch in off-white waxed thread with slight artisanal unevenness, antiqued brass turn-lock clasp, 45-degree front angle, soft large softbox light from upper left, faint reflection on warm gray seamless background, ultra sharp, Hasselblad medium format, f/8, --ar 4:5 --style raw
[Negative] plastic texture, patent leather gloss, machine stitching, chrome hardware, floppy shape, deformed flap, logo text, watermark

[平铺图]
Flat lay top-down photo of the same cognac vegetable-tanned saddle bag lying closed on warm beige linen fabric, an open leather conditioner tin and a brass key placed beside as props, soft natural window light, minimalist composition with margin, magazine editorial style, --ar 1:1

[皮料微距]
Extreme macro photograph of vegetable-tanned cognac cowhide surface, clearly visible individual hair pores, fine natural grain and slight pull-up effect where darker oils show beneath lighter surface, shallow depth of field, raking side light revealing texture, photorealistic, --ar 4:5
[Negative] smooth plastic, embossed fake grain, crocodile pattern, glossy patent, uniform color

[缝线特写]
Macro of hand saddle stitching on thick cognac leather edge, two needles visible rhythm of slightly angled off-white waxed linen thread, minor hand-made irregularities in stitch spacing, burnished dark leather edge beside stitching, soft directional light, --ar 1:1
[Negative] perfect machine stitching, serger seam, white plastic thread, loose threads, frayed edge

[五金特写]
Close-up of antiqued brass turn-lock clasp on leather bag flap, brushed aged brass with subtle patina and tiny wear marks, warm metal reflection, deep cognac leather background blurred, macro, --ar 1:1
[Negative] polished chrome, silver, shiny gold plating, plastic clasp, brand engraving text

[上身图]
Candid street style photo of an Asian woman in her early 30s wearing beige trench coat and jeans, the cognac leather saddle bag slung over shoulder resting at hip, walking on a tree-lined street in afternoon light, shot on 85mm lens, shallow depth of field, natural unposed moment, film color, --ar 4:5
[Negative] fashion model pose, studio white background, stiff catalog pose, oversized bag, tiny mini bag, western face

[咖啡馆场景图]
Cozy independent cafe scene, the cognac saddle bag placed on a wooden chair beside a latte and an open paperback book, soft window light, warm interior wood tones, shallow depth of field lifestyle photography, --ar 4:5
[Negative] crowded cafe, fast food cup, neon signs, clutter, harsh flash

[养色对比图]
Split comparison product photo: LEFT side a brand-new pale honey cognac vegetable-tanned saddle bag fresh and stiff; RIGHT side the same exact saddle bag after one year of use showing rich deep chestnut patina, darkened glossy areas where hands touched, soft relaxed leather body, more pronounced amber tone on flap corners, both bags on warm gray background, identical lighting and angle for honest comparison, ultra detailed, --ar 16:9
[Negative)  different bag shapes, black leather, red leather, damaged torn bag, uneven lighting between sides, text labels

[说明]
植鞣皮随使用从浅蜜色养成深栗色是核心卖点，对比图直接放在详情页第二屏