Anthropomorphic spider girl, hybrid insect humanoid, beautiful young woman with smooth pale skin merging into black chitinous exoskeleton on lower body, four additional slender spider legs growing from her hips and lower back, elegant human arms and hands, large multi-faceted compound eyes with subtle human iris, sharp fangs slightly visible, long silky black hair with web-like strands, delicate spinnerets, sensual curves, large breasts, narrow waist, full hips, glossy black carapace on thighs and abdomen, standing in a dark cavern, soft moonlight, highly detailed, intricate web patterns on skin, erotic pose, seductive expression, realistic anatomy, 8k, cinematic lighting