| subgroup_id | base_bg_id | members | generation_chain | conf | reason |
|---|
| L01_main_underbrush_path | L01B01 | L01B01 | L01B01 | high | Single background entry depicting a damp, muddy forest path. |
| L02_main_utility_pole | L02B01 | L02B01 | L02B01 | high | Single background entry depicting an urban alley centered around a utility pole. |
| L03_main_forensics_area | L03B01 | L03B01 | L03B01 | high | Single background entry depicting a desaturated daylight crime scene forensics area. |
| L04_main_rooftop_yard | L04B02 | L04B02 | L04B02 | high | Rooftop yard depicted from a high oblique overhead angle, distinct from the other close-up angles. |
| L04_main_entrance_door | L04B03 | L04B03 | L04B03 | high | Rooftop entrance door setup depicted from an ankle-height perspective, distinct from the yard's overhead perspective. |
| L04_main_rooftop_window | L04B01 | L04B01 | L04B01 | high | Rooftop window setup captured from a low angle beside a structural wall, distinct from the yard and entrance door setups. |
| L05_main_kitchen_living_area | L05B02 | L05B02 | L05B02 | high | The main kitchen and living area of the apartment, representing its own distinct physical room. |
| L05_main_bathroom_desk | L05B01 | L05B01 | L05B01 | high | A separate hallucinatory bathroom/living desk zone with distinct sub-location and pristine state. |
| L05_main_ransacked_bedroom | L05B03 | L05B03 | L05B03 | medium | Split from other bedroom variants due to a different door framing, dusk time phase, and ransacked state. |
| L05_main_crime_bedroom | L05B04 | L05B04, L05B05 | L05B04 -> L05B05 | high | These entries depict the exact same bedroom subspace, transitioning from a blood-splattered crime scene to an eerily clean state. |
| L06_main_coastal_road | L06B01 | L06B01, L06B02 | L06B01 -> L06B02 | high | L06B02 is a strict variant of L06B01, maintaining structural layout continuity of the coastal road from day to foggy night. |
| L07_main_kennel_rows | L07B01 | L07B01 | L07B01 | high | Single background entry depicting the interior kennel rows of an animal shelter. |
| L08_main_storefront | L08B02 | L08B02, L08B01 | L08B02 -> L08B01 | high | These plates represent the exact same storefront exterior, maintaining strict structural alignment from dusk to dawn. |
| L09_main_product_aisle | L09B01 | L09B01 | L09B01 | high | Single background entry depicting the interior supermarket product aisle. |
| L10_main_admin_desk | L10B01 | L10B01 | L10B01 | high | Single background entry depicting the interior of an administrative office desk. |
| L11_exterior_stairwell_landing | L11B01 | L11B01 | L11B01 | high | Single background entry depicting an outdoor narrow rooftop stairwell landing. |
| L12_main_bus_stop_bench | L12B01 | L12B01 | L12B01 | high | Single background entry depicting a desolate coastal bus stop bench at night. |
| L13_main_duty_desk | L13B02 | L13B02 | L13B02 | high | The main desk in the general police duty office, distinct from the detective's evidence desk. |
| L13_main_evidence_desk | L13B01 | L13B01 | L13B01 | high | The detective's evidence desk layout, representing a distinct desk workspace from the duty desk. |
| L14_main_frontage | L14B01 | L14B01 | L14B01 | high | Single background entry depicting the exterior concrete building frontage. |
| L15_main_cubicle_desk | L15B01 | L15B01 | L15B01 | high | Single background entry depicting the interior cubicle layout of a PC room. |
| L16_main_quay_edge | L16B01 | L16B01 | L16B01 | high | Single background entry depicting the wet cobblestone quay edge of a coastal harbor. |
| L17_main_outer_rail_deck | L17B01 | L17B01 | L17B01 | high | Single background entry depicting the wet open deck of a fishing boat. |
| L18_main_helm_console | L18B01 | L18B01 | L18B01 | high | Single background entry depicting the interior wheelhouse and helm console of the fishing boat. |
| L19_main_fog_wall_boundary | L19B01 | L19B01 | L19B01 | high | Single background entry depicting the open ocean boundary and its looming fog wall. |