想做一张纯黑背景、人物自带微光的"幽灵感"肖像，关键是让头发和薄纱边缘发亮、皮肤透。第一版背景没压死，人物就浮不起来，后来把背景做成近黑渐变、再加软发光才对味。十字耳饰那个小细节是特意保留的，一点冷金属能把整体的苍白衬得更冷。
我最后用的英文提示词，把光和材质补得更完整了：
A highly realistic yet ethereal digital painting of a pale-skinned young woman with long flowing white hair and striking pale-blue eyes. She wears a translucent semi-sheer white robe softly draping over her slender frame. Delicate features, subtle blush, soft red lips. A small silver cross earring in her left ear, a matching thin necklace with a tiny pendant, a white beaded bracelet on her left wrist. Right arm crossed over her chest, left arm resting on her lap. Deep near-black gradient background makes her luminous skin stand out. Soft rim glow around the hair and robe edges, gentle volumetric light, otherworldly ghostly aura, fantasy portrait, fine skin texture, shallow depth of field, high detail.
发光边缘全靠 rim glow + near-black 背景撑，背景一亮就没那股幽灵劲儿了。
