Establishing reference photograph of a place: 2D hand-drawn cartoon background, medium-weight dark-brown outlines, flat cel fills with one-step shading, no grain, still painted look. Long empty indoor hallway leading to a closed far door. Thick blue-grey smoke rolls under the ceiling and fills the upper half, while a clear band of air stays above the floor. Dim ceiling lamps glow faintly through the haze. A glowing green emergency exit sign above the far door, a blank luminous panel without letters, casts a soft green light on the walls and floor. No people, no text.
No people, no visible text, no watermark.
