程序员的浪漫就是跑机械骷髅（笑）。这张想要"恐怖但精密"的平衡，头骨要干净象牙白、机械冠冕每个零件都得像真能装上去，最忌讳糊成一团黑泥。反复强调 no biological sludge、no random black mass 之后，那堆镜头、齿轮、PCB 才清晰立体起来。冷蓝雾 + 暖橙轮廓光这组打光是整张的电影感来源。
下面是我打磨后的英文提示词，结构更清楚也更好复现：
masterpiece, ultra detailed, hyperrealistic, cinematic biomechanical horror, cybernetic undead android, centered symmetrical upper-body portrait, vertical composition.
A terrifying humanoid skull of pale polished ivory bone with subtle micro-cracks, fine pores and realistic bone texture. Deep black eye sockets with intense glowing crimson LED eyes. A massive mechanical crown fused into the skull: precision optics, industrial camera lenses, turbines, gears, pistons, PCB fragments, microchips, titanium frames and hydraulic components, every part sharply defined and physically believable.
Neck and torso clad in a clean high-tech cybernetic exoskeleton: armor plates, exposed electronics, braided cables, optical fibers, carbon-fiber panels, titanium ribs, glowing circuitry, servo motors and precision joints, a dense wire network linking skull to chest. No dirt, no biological sludge, no random black mass.
Realistic brushed steel, titanium, carbon fiber and ceramic materials, tiny screws, machining marks, micro scratches, condensation droplets, accurate reflections.
Cold blue-gray cinematic lighting with soft volumetric fog, warm orange rim lights on the crown, bright evenly exposed face. High dynamic range, natural contrast, soft shadows, filmic grain, shallow depth of field, razor-sharp focus on the skull. Unreal Engine 5, Octane Render, ray tracing, physically based rendering, dark sci-fi atmosphere.
那几句 no sludge 是关键，删了立马糊回黑泥。