Same photo. Same person. Only the time of day changed. This is a simple day-to-night background edit using a structured prompt Lighting, sky, reflections and mood all shift naturally No subject changes, no fake glow, no filters Perfect for travel shots, lifestyle posts or making one photo work twice { "task": "background_edit", "instruction": "Change the background from daytime to nighttime. Preserve the subject exactly.", "subject_rules": { "do_not_change": [ "face", "body", "pose", "expression", "clothing", "hair", "skin tone", "camera angle", "framing" ] }, "background_rules": { "time_of_day": "night", "lighting": "natural nighttime lighting", "light_sources": [ "street lights", "building lights", "window glow" ], "sky": "realistic night sky matching the location", "shadows": "soft, natural shadows consistent with light sources" }, "constraints": { "edit_background_only": true, "match_original_location": true, "maintain_depth_and_perspective": true, "no_subject_relighting": true }, "style": { "photorealistic": true, "no_stylization": true, "no_cinematic_grading": true }, "negative_prompt": [ "change subject", "artificial glow", "cinematic lighting", "neon colors", "fantasy elements", "cgi look" ] }