The Backrooms as the original lore pictures them: mono-yellow wallpaper, damp beige carpet, humming fluorescent panels and identical rooms repeating forever, plus the white-tiled poolrooms with still turquoise water. The default look is a cheap old digital camera snapshot: slightly overexposed, yellow-green cast, grainy. Empty is scariest.

How to prompt: start with backroomstyle,, name the level (Level 0 yellow rooms, poolrooms, Level 1, Level 2, Level Fun…) and describe walls, floor and lights, then each person or entity's look, age like "an adult man aged 23", position and action. For the lore feel, keep the frame empty, the camera old and overexposed, and the people small and alone. Weight 0.8; go up to 0.9 if the style is weak.