| subgroup_id | base_bg_id | members | generation_chain | conf | reason |
|---|
| sg_L01_main | L01B01 | L01B01 | L01B01 | high | Single background entry depicting the damp, muddy forest underbrush path. |
| sg_L02_main | L02B01 | L02B01 | L02B01 | high | Single background entry representing the wet dark alley under a utility pole. |
| sg_L03_main | L03B01 | L03B01 | L03B01 | high | Single background entry showing the desaturated daylight forensics crime scene area. |
| sg_L04_yard | L04B02 | L04B02 | L04B02 | high | Depicts the overhead wide shot of the villa rooftop yard, a distinct spatial area from the doors and windows. |
| sg_L04_door | L04B03 | L04B03 | L04B03 | high | Depicts the iron entrance door on the roof deck, which is a different architectural spot than the open yard. |
| sg_L04_window | L04B01 | L04B01 | L04B01 | high | Depicts a close medium shot beside a damp wall with a rooftop window, representing a distinct architectural zone. |
| sg_L05_kitchen | L05B02 | L05B02 | L05B02 | high | Represents the main kitchen and living area of the rooftop apartment, physically separate from the bedroom. |
| sg_L05_dream | L05B01 | L05B01 | L05B01 | medium | An unnaturally spotless dream version of the apartment showing the bathroom and desk, which is distinct from the regular kitchen. |
| sg_L05_bedroom | L05B03 | L05B03, L05B04, L05B05 | L05B03 -> L05B04 -> L05B05 | high | These entries all depict the apartment's bedroom from the doorway, showing different states of ransacking, blood-splatter, and cleanup. |
| sg_L06_coastal | L06B01 | L06B01, L06B02 | L06B01 -> L06B02 | high | Both entries represent the same coastal road edge, with L06B02 showing a night/fog variant of the day road. |
| sg_L07_shelter | L07B01 | L07B01 | L07B01 | high | Single background entry showing the animal shelter kennel rows. |
| sg_L08_storefront | L08B02 | L08B01, L08B02 | L08B02 -> L08B01 | high | Both entries depict the exterior storefront and architectural awning of the mart. |
| sg_L09_aisle | L09B01 | L09B01 | L09B01 | high | Single background entry depicting the product aisle inside the retail mart. |
| sg_L10_office | L10B01 | L10B01 | L10B01 | high | Single background entry depicting the small administration office desk. |
| sg_L11_exterior | L11B01 | L11B01 | L11B01 | high | Single background entry representing the rooftop stairwell landing. |
| sg_L12_bus_stop | L12B01 | L12B01 | L12B01 | high | Single background entry showing the coastal bus stop shelter bench at night. |
| sg_L13_duty_desk | L13B02 | L13B01, L13B02 | L13B02 -> L13B01 | high | Both entries depict the desk area in the police office, representing day/night and active/inactive duty states. |
| sg_L14_frontage | L14B01 | L14B01 | L14B01 | high | Single background entry showing the exterior frontage of the police station. |
| sg_L15_cubicles | L15B01 | L15B01 | L15B01 | high | Single background entry showing the cubicle desk inside a computer room. |
| sg_L16_quay | L16B01 | L16B01 | L16B01 | high | Single background entry representing the harbor quay edge. |
| sg_L17_deck | L17B01 | L17B01 | L17B01 | high | Single background entry representing the outer deck rail of a fishing boat. |
| sg_L18_wheelhouse | L18B01 | L18B01 | L18B01 | high | Single background entry representing the interior boat wheelhouse. |
| sg_L19_ocean | L19B01 | L19B01 | L19B01 | high | Single background entry representing the view of the open ocean and fog wall. |