Create a finished vertical cinematic one-sheet poster for a psychological horror movie titled “THE HOLLOW ROOM.” Center the composition on a single half-open doorway at the end of a narrow, abandoned corridor; inside the room, only an unnaturally elongated human shadow is visible, cast toward the viewer even though no person stands there. Use symmetrical framing, oppressive depth, and generous negative space to make the doorway the unmistakable focal point. The corridor has cracked plaster, faded wallpaper, damp floorboards, and restrained signs of decay, rendered with believable photographic texture and perspective. Light the scene with a weak cold-blue glow leaking from the room, contrasted by one dim amber ceiling lamp. Build the palette from charcoal black, bone white, desaturated blue, and a single restrained trace of deep red beneath the door. Create tension through silence, absence, shadow, and unsettling spatial ambiguity—no gore, jump-scare face, monster reveal, or blood splatter. Place the title “THE HOLLOW ROOM” in large, widely spaced bone-white serif lettering across the lower third, clean and sharply legible against darkness. Add the short tagline “SOMETHING STAYED BEHIND.” above the title in small uppercase letters. Keep all typography precisely aligned and integrated into the composition. Polished theatrical horror key art with realistic lens logic, controlled film grain, subtle analog texture, strong visual hierarchy, and an ominous, restrained, publishable poster finish.