Establishing reference photograph of a place: 2D hand-drawn illustration of a dimly lit high-security briefing room carved inside a mountain base, empty. Rough rock walls meet steel-grey paneling, glowing holographic displays and tactical maps hovering above a central metal table, casting cool blue light. Dark navy shadows fill the corners, faint overhead strip lamps give sparse ambient light, a few amber indicator lights glint on consoles. Tense, professional, militaristic atmosphere, eye-level wide view, clean inked lines, muted painterly shading, no people, no text.
No people, no visible text, no watermark.
