## Background spec
bg_id: {bg_id}
loc_id: {loc_id}
sub_location: {sub_location}
state_label_raw: {state_label_raw}
surface_role: {surface_role}

## Source language (HARD CONSTRAINT — t2i_prompt body, ref_guide, and shot_guides[].guide_text MUST be written in this language)
source_language: {source_language}

## References
floor_plan: {floor_plan_path_block}
prior backgrounds: {prior_bg_paths_block}

## Base markers (if a floor-plan reference exists, these are already drawn on it; layout reference only — do not redraw or relocate)
{base_markers_block}

## Transient / event overlay policy
Transient / event overlay markers are intentionally withheld from this background-plate prompt. Render only base structure, persistent fixtures, fixed furniture, stable materials, age / wear / patina, lighting state, and the camera framing implied by the recommendation. Current-shot event residue (fresh wounds, displaced bodies, in-progress actions, subject gestures, photo-handling moments) belongs to the scene / I2I layer, not the BG plate.

## Camera recommendation (from floor_plan_prompt)
{camera_recommendation_block}

## Applies to shots
{applies_to_shots_block}

## visual_world_rules
{visual_world_rules}