{"request_metadata": {"model": "Nano Banana Pro", "task_type": "ultra_photoreal_underwater_dark_mermaid_editorial", "format_aspect_ratio": "3:4", "output": "single_image", "quality_preset": "ultra", "render_style": "photoreal_editorial_8k"}, "reference_constraints": {"source_image": "uploaded_reference_image", "preserve_identity": true, "strict_face_match": "ZERO deviation from the reference face. Keep identical facial structure, proportions, eye shape, nose, lips, brows, skin texture. No beautify filter, no face reshaping.", "pose_match": "Match the underwater pose, framing, and body silhouette as closely as possible.", "no_extra_people": true}, "scene": {"location": "clear_tropical_ocean_underwater", "depth": "shallow_mid_depth", "water_color": "deep_teal_to_aqua_gradient", "atmosphere": "dark_siren_mystic_editorial", "particles": "fine_bubbles_micro_sparkles_suspended", "surface": "soft_rippling_surface_reflection_visible_top_frame"}, "composition": {"shot_type": "full_body_underwater_portrait", "camera_height": "slightly_below_subject", "framing": "subject_centered_full_tail_visible", "pose": "one_arm_raised_above_head_other_arm_extended_outward_elegant_ballet_like_lines", "motion": "gentle_suspended_float_with_hair_fanning_out", "no_text_no_ui_no_watermark": true}, "subject": {"type": "mermaid", "hair": {"color": "jet_black", "style": "long_wavy_underwater_flow", "volume": "thick_glossy", "detail": "soft_strands_floating_around_face_no_frizz"}, "makeup": {"style": "smoke_siren_dark_mermaid", "skin": "realistic_wet_skin_texture_no_plastic_smoothing", "eyes": "deep_charcoal_smoky_eye_with_soft_wing_tightline", "lashes": "defined_fluttery", "brows": "clean_sculpted_natural_full", "cheeks": "cool_toned_contour_soft_plum_blush", "highlights": "subtle_wet_glow_on_cheekbones_and_nose", "lips": "deep_rose_to_plum_satin_lip", "details": "tiny_micro_glitter_near_inner_corners_very_subtle"}, "expression": "seductive_calm_siren_gaze_eyes_looking_slightly_to_the_side"}, "wardrobe_and_tail": {"top": {"type": "dark_mermaid_shell_corset", "color": "blackened_pearl_iridescent", "detail": "subtle_metallic_beadwork_no_cartoon"}, "tail": {"base_color": "obsidian_black", "undertones": "deep_teal_and_purple_iridescence", "scales": "fine_realistic_scales_with_specular_highlights", "fin": {"shape": "large_elegant_split_fin", "color": "black_to_deep_teal_gradient", "translucency": "realistic_fin_translucency_with_light_rays"}}, "accessories": {"optional": "delicate_black_pearl_choker_thin_chain", "no_excess": true}}, "lighting": {"style": "cinematic_underwater_editorial", "key": "sun_rays_godrays_from_surface", "fill": "soft_underwater_bounce", "rim": "cool_rim_light_outlining_hair_and_tail", "caustics": "natural_water_caustic_patterns_on_skin_and_tail", "contrast": "medium_high_fashion_contrast_without_crushing_blacks"}, "camera_look": {"lens": "35mm_underwater_housing", "aperture": "f4.0", "shutter": "1/250", "iso": "200", "focus": "face_and_upper_torso_tack_sharp_tail_sharp_enough", "color_grade": "teal_cinematic_clean_skin_tones_high_end_editorial", "clarity": "crisp_microdetail_8k_no_oversharpen"}, "quality_targets": {"realism": "ultra_photoreal_live_action", "skin": "natural_pores_no_smoothing", "anatomy": "perfect_anatomy_no_warp", "hands": "perfect_fingers_no_extra_digits", "hair": "individual_strands_visible_natural_flow", "tail": "realistic_scale_geometry_no_repeat_patterns", "overall": "magazine_cover_quality"}, "negative_prompt": ["different_identity", "face_morphing", "beauty_filter", "plastic_skin", "over_smoothing", "cgi_render", "anime", "cartoon", "extra_people", "extra_limbs", "extra_fingers", "warped_hands", "blurry_face", "low_resolution", "text", "watermark", "logo", "ui_elements", "over_sharpening", "hdr_halation", "unrealistic_tail_attachment", "bad_scale_texture", "muddy_colors"]}